Early models often failed to withstand crashes, however, so in 1965 the device was completely redesigned and moved to the rear of the plane – the area least subject to impact – from its original position in the landing wells (起落架舱).

出自-2010年6月阅读原文

As water tables have fallen and irrigation wells have gone dry, China's wheat crop, the world's largest, has declined by 8% since it peaked at 123 million tons in 1997.

2016年6月四级真题（第一套）阅读 Section B

Companies from Google to L'Oréal to IBM to Wells Fargo are known to use some degree of gamification in their workplaces.

2016年12月四级真题（第三套）阅读 Section B

millions of irrigation wells in many countries are now pumping water out of underground sources faster than rainfall can refill them.

2016年6月四级真题（第一套）阅读 Section B

This means that some wells may even need to undergo desalination after extraction, thus increasing the cost.

2018年12月四级真题（第一套）阅读 Section C

Wells are much more reliable sources of freshwater, and California is hoping that these deep wells may be the answer to their severe water shortage.

2018年12月四级真题（第一套）阅读 Section C

Well before the arrival of freezers, there was a demand for ice for food preservation and catering, malcolm will explain the history of importing natural ice and the technology of building ice wells, and how London's ice trade grew.

2015年高考英语全国卷1 阅读理解 阅读A 原文