Questions about the dam's usefulness in flood control comes on top of other issues.

大坝在洪水控制方面是否有效的问题是最最重要的。

youdao

The New water Project will purposely allow the polder to flood with water and all the buildings will be perfectly suited to float on top of the rising and falling water.

而‘新水’项目将特意让这片堤围泽地积满水，所有的建筑物将完美而适合地浮在涨涨落落的水面上。

youdao

Wen said he had to bring his child and elderly parents here to the top of the hill immediately because they cannot flee if the flood comes.

他说，他不得不赶快带着孩子和年迈的父母爬到山顶来，因为如果洪水来了，他们逃不了。

youdao

The Syrian conflict comes on top of the flood of refugees that came from Iraq just a decade ago.

CNN: Obama takes it easy on the last day of a busy Mideast visit

Exeter City Labour MP Ben Bradshaw said the city saw "noticeable near misses where the water was pretty much up to the current top of our flood defences".

BBC: Exeter flood defence improvement works to start in 2014

Wind-whipped whitecaps curled over the top of the flood walls near the Claiborne Avenue railroad bridge while others poured across the levee in the Gentilly neighborhood, north of downtown.

CNN: Concerns about New Orleans-area levee ease