a careful and systematic study of a subject to discover new facts or information about it
研究
doing something that someone has planned to, often when they find the right time
to perform a helpful or kind act for someone, typically without expecting something in return
the certificate that is given to university or college students upon successful completion of their course
学位
used to mean that one can go on or manage without someone or something
used to mean that one benefits from having someone or something present or available to one
to fasten, button, zip, or otherwise secure something, often related to clothing or accessories
扣上
waste such as bottles, papers, etc. that people throw on a sidewalk, park, or other public place
垃圾
to flood or inundate with water, typically to the point of making an area saturated or soaked or difficult to traverse
淹没
the scattered fragments or remains of something that has been broken, destroyed, or discarded, typically resulting from a natural disaster, accident, or wreckage
碎片
to move in a twisting or whirling motion, creating a pattern of circular or spiral motion
旋转
to eat something quickly and greedily, often making loud and rapid swallowing sounds
狼吞虎咽
the sequence of organisms in an ecosystem where each organism serves as a source of food for the next organism in the chain
食物链
referring to items or products that are designed to be used once and then discarded
一次性
used in speech to provide emphasis, or to signal a pause in speech while the speaker gathers their thoughts
我是说
used to summarize or draw a conclusion based on previous information or to provide a logical inference
所以