He grew a different crop on the same field five years in a row, what researchers call crop rotation.

他连续5年在同一块地上轮流种植不同作物，研究人员称之为轮作。

《柯林斯英汉双解大词典》

The very first 911 call was made on February 16, 19 in Alibama.

第一个911报警电话是19年2月16日在阿里巴玛拨打的。

youdao

In theory I'm on call day and night.

理论上，我不分昼夜随叫随到。

《柯林斯英汉双解大词典》

Today the idea lives on in a new generation of string trimmers and edgers that people often call weed whackers.

VOA: special.2011.07.19

Do you have available to you what we call the hacker editions in more details on those in the courses syllabus?

你是否有黑客版套题,比教学大纲上的版本更详细？

哈佛公开课 - 计算机科学课程节选

I call them on the phone, and we meet up in person as much as we can.

我给他们打电话，而且我们尽可能多见面。

用社交网站找到的人 - SpeakingMax英语口语达人

Other options for filling the energy gap would include making greater use of the large number of small generators that the National Grid can call on in time of shortage, and extending the use of contracts that allow the grid to interrupt supply to industrial customers at peak periods.

BBC: RELATED BBC SITES

This provision would prioritize spending on debt service and Social Security to give them both first-call on revenues in the event the debt limit is reached.

FORBES: In Passing The Most Recent Budget, Congress And The President Lied

Some of Mr Hague's lieutenants compare their leader's move with Tony Blair's decisive call on Labour in 1994 to delete the hallowed Clause Four from the party's manifesto.

ECONOMIST: Roll up that map of Europe