The idiom "gray area" is derived from the color gray, which is often associated with ambiguity and uncertainty. It has been used in the English language for many years to describe situations or issues that are not clearly defined, making it challenging to establish precise boundaries or categorize them definitively.

What is the origin of the idiom "gray area" and when to use it?

gray area

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The origin of the idiom "green light" can be traced back to the early 20th century, specifically to the traffic signal system. The use of red, yellow, and green lights in traffic signals was introduced to regulate and control vehicular movement. The green light, being the third and final signal in the sequence, indicated that it was safe for drivers to proceed. This phrase is frequently used in business settings, project management, decision-making processes, and personal endeavors.

What is the origin of the idiom "green light" and when to use it?

green light

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out of the blue

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The idiom "red tape" has its origins in 16th century England where legal documents were bound by red tape as a way of showing that they were official. This phrase is typically used to describe excessive bureaucracy or official procedures which can hinder or delay progress.

What is the origin of the idiom "red tape" and when to use it?

red tape

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The phrase "in the red" originates from the practice of using red ink to indicate negative amounts or deficits in financial records and accounting ledgers. This idiom is used to describe a financial situation where expenses exceed income, resulting in a negative balance or deficit.

What is the origin of the idiom "in the red" and when to use it?

(in|into) the red

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purple patch

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white flag

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The idiom "with flying colors" is believed to have originated in the 16th century. At the time, flags were used to signal victory in battle. A flag that was flying high and undamaged was seen as a sign of victory, while a flag that was damaged or lowered was seen as a sign of defeat. The phrase "with flying colors" came to be used to describe a person or group who had achieved success or victory. It suggests that the person or group has performed exceptionally well and has surpassed expectations.

What is the origin of the idiom " with flying colors" and when to use it?

with flying colors

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solar

https://tts.langeek.co/read?text=c29sYXI&hash=cdea06f99bf979ba6750190de071db9dcdf3d5ff&lang=en&cache-only=0&driver=googletts

cosmic

https://tts.langeek.co/read?text=Y29zbWlj&hash=5887965abf98bdfc01e892ba1c37b87c028702bf&lang=en&cache-only=0&driver=googletts

celestial

https://tts.langeek.co/read?text=Y2VsZXN0aWFs&hash=7fa8ed0f82d66a738210411d988b668ef183a9b9&lang=en&cache-only=0&driver=googletts

planetary

https://tts.langeek.co/read?text=cGxhbmV0YXJ5&hash=6d65fabeabd64429f982321e91ee5a2b625a4c9e&lang=en&cache-only=0&driver=googletts

stellar

https://tts.langeek.co/read?text=c3RlbGxhcg&hash=1205372a177ea147c3b12fb2dcb7b05079c222ab&lang=en&cache-only=0&driver=googletts

atmospheric

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gravitational

https://tts.langeek.co/read?text=Z3Jhdml0YXRpb25hbA&hash=87e878e9091d62a9f75854b18e59e764bf967428&lang=en&cache-only=0&driver=googletts

terrestrial

https://tts.langeek.co/read?text=dGVycmVzdHJpYWw&hash=c8f73b4da12e4f34f96c72ed6c4182e625ea0c43&lang=en&cache-only=0&driver=googletts

galactic

https://tts.langeek.co/read?text=Z2FsYWN0aWM&hash=8c66816e6548b919ae9f8356757aa38d54d2cf75&lang=en&cache-only=0&driver=googletts

lunar

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blue-collar

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white-collar

https://tts.langeek.co/read?text=d2hpdGUtY29sbGFy&hash=f0b208a1678ca1371715279ed4f3452d19e3e3bc&lang=en&cache-only=0&driver=googletts

golden opportunity

https://tts.langeek.co/read?text=Z29sZGVuIG9wcG9ydHVuaXR5&hash=e3f9c7542c49ad7982a4e9cd1f17a7f5af156b59&lang=en&cache-only=0&driver=googletts

Here you will find the vocabulary from Unit 10 - 10A in the Insight Advanced coursebook, such as "grey area", "celestial", "red tape", etc.

Insight Advanced 第10单元 - 10A词汇