length of time

基本解释

Yet, the length of time does not correspond to an observed reality; it could be from five years to fifty years.
然而，這個時間的長度與觀測到的現實無法對應起來，它可能是五年，也可能是五十年。
As soon as you get the urge to eat something you need to find something else to do for the next 15 minutes (the length of time it can take to get over an urge).
一旦你有喫東西的沖動，在接下來的15分鍾找點別的事情做（時間的長度要能緩過這個沖動勁）。
The duration required to define the work depends on the length of time necessary to discover and document the information, as well as the time required to gain agreement and approval from the client.
需要花費在定義項目工作上的時間取決於了解和文档化這些信息所必需的時間長短，也取決於需要花費在獲得客戶的同意和認可上的時間長短。

How quickly this can happen depends on the length of time a person is breathing the gas and the amount of the gas he or she breathes in.
Well, if this thing is going to vibrate for any length of time it better be a standing wave.
好的，如果它在任意時間振動,那它就是駐波。
麻省理工公開課 - 固態化學導論課程節選
How long" can be used in a question and it refers to a length of time or a length of distance.
How long” 句型用於問句中，用來詢問時間或距離的長短。
How long課堂 - SpeakingMax英語口語達人

The length of time seeking new employment has not been seen since the Great Depression.
FORBES: Labor Pains