1.get a leg up 占据优势

Critics say such munificence is just a way for Chinese firms to get a leg up over competitors in the scramble to lock up Africa's resources.

有批评人士称，中国的慷慨只是为了让中国公司在获取非洲资源方面得到竞争优势nI&Xu2b3E.5p2haEFu+^。

2.a string of 一系列

A string of scandals is obsessing America.

一系列丑闻在困扰着美国nt5Mp*#dd@BVPf。

3.puzzle over 苦苦思考

In rehearsing Shakespeare, I puzzle over the complexities of his verse and prose.

排演莎士比亚戏剧时，我苦苦地思索着他诗歌和散文中的复杂难懂之处Rq9bqcAsuK。

4.comply with 遵守

Some beaches had failed to comply with environmental regulations.

一些海滩没能遵守环保规定)=~Up54uRtiAHvj.7(f。