used to describe a person during a specific time in their life

作为, 当...时
used to specify the intended or scheduled time for an event, activity, or arrangement

为
expressing the exact time when something happens

在, 于
used to show when something must be completed or occurs

在...之前, 到...为止
used to indicate the arrival or occurrence of a particular time, event, or situation

到了, 当到来时
used to show the time period in which something occurs

通过, 在...期间
used to indicate that something has happened or existed throughout a long period of time

历经, 穿过
used to state how long it will be until something happens

在
used to show a day or date

在, 于
used to indicate that someone or something is waiting for or dependent on another event, decision, or action

待定, 等待中
used to indicate proximity in time

向, 接近
used to indicate a specific point in time or a reference point from which information or a situation is being considered

截至, 自
referring to the period or duration during which something happens, develops, or takes place

在...的过程中, 在...期间
during a particular period or while something is happening

在...之中, 在...期间
during a particular situation or condition

在...之中, 在...期间
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