without a fixed schedule or pattern

时不时, 偶尔
Ex: From time to time, I like to switch up my workout routine to keep things interesting .**时不时**,我喜欢改变我的锻炼习惯以保持事物的趣味性。
in time
[副词]
without being late or delayed

及时, 按时
Ex: He left early to be in time for the appointment .他早早离开,以便**准时**赴约。
one at a time
[副词]
in a sequential manner, one after the other

一次一个, 逐一
Ex: The guests arrived one at a time, each bringing a unique gift .客人们**一个接一个**地到达,每个人都带来了一份独特的礼物。
at last
[副词]
in the end or after a lot of waiting

终于, 最后
Ex: They were apart for months , but at last, they were reunited .他们分开数月,但**终于**重逢了。
at once
[副词]
immediately or without delay

立刻, 马上
Ex: The system detected the error and corrected it at once.系统检测到错误并**立即**纠正了它。
decade
[名词]
ten years of time

十年
Ex: The technology has evolved significantly in the last decade.在过去的**十年**里,技术有了显著的发展。
irregular
[形容词]
lacking consistency, especially in occurrence or activity

不规则的, 不稳定的
Ex: Many people in irregular employment do not have access to the same benefits as full-time employees .许多从事**不规则**就业的人无法获得与全职员工相同的福利。
all along
[副词]
from the beginning or continuously throughout a period of time

从一开始, 一直
Ex: He was aware of the mistake all along but did n't point it out .他**一直**知道这个错误,但没有指出来。
all of a sudden
[副词]
in an unexpected or abrupt manner

突然, 忽然
Ex: All of a sudden, the power went out , leaving the house silent .**突然**停电了,房子里一片寂静。
to go by
[动词]
to pass a certain point in time

流逝, 过去
Ex: I ca n't believe how quickly the weekend went by.我无法相信周末这么快就**过去了**。
to pass the time
[短语]
to do something to make a period of waiting or inactivity feel shorter
Ex: She read a book to pass the time on the train.
| 剑桥英语: FCE (B2 First) |
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