A point that Democratic presidential contenders like to hone in on as they attack Trump's economic policies. Economy and a government that works for all of us, not wealthy campaign contributors.上述句中出现了短语hone in on 是什么含义？如何使用？ 词典上没找到。
...服服帖帖，幻化无穷，不由让人心旷神怡。It is quite an honor to have the luxury of observing the making of sand
sculpture on the flat dune by artists in whose skillful hands the formless sand
can perform, as the artists wish, countless forms, which makes us stunning and
delightful....
...s of people, both above and below the offending executive and including my own boss if necessary, so that everyone involved can see the rewards for teamwork and the drawbacks of non-cooperation.请教曹老师，both...and...做连词也可以连接两个介词短语吗？
Last
August, city officials interviewed about 500 residents to find out people’s
attitudes to protecting the environment and what actions they had taken.句子摘自北师大高中英语必修第三册第8单元(p40)。请帮忙分析和翻译这个句子，谢谢。
To navigate to the declaration of a class, method or variable used somewhere in the code, position the caret at the usage and press Ctrl+B. You can also click the mouse on usages with the Ctrl key pressed to jump to declarations.请教一下，usage前面为什么一下用at，一下用on？
...more un-French. But Lehanne’s psychology cafe is about more than knowing oneself: It’s trying to help the city’s troubled neighborhood cafes. Over the years, Parisian cafes have fallen victim to changes in the French lifestyle—longer working hours, a fast-food boom and a younger generation...