the man is skilled at repair the machine?为什么是 repair 而不是 repairing,不是be skilled at doing吗

the man is skilled at repair the machine?为什么是 repair 而不是 repairing,不是be skilled at doing吗 skilled at 是什么意思?翻译：she is skilled at using a computer. the skilled–unskilled The man is tall ,___(like) a huge man 1.Though a skilled worker, _____（ 他被公司解雇了 ） last week because of the economic crisis.he is fired by his corporation 对吗? the man is a really lucky dog Who is the man in a u The man ( ) a hat is my father The man ( )a ht is my father The man is a very ______person.(success) Wise is the man who stops a Though a skilled worker,he was fired by the companylast week because of the economic crisis.怎么翻Though a skilled worker怎么翻译 全美数学建模赛 2011 赛题 翻译PROBLEM A: Snowboard Course Determine the shape of a snowboard course (currently known as a “halfpipe”) to maximize the production of “vertical air” by a skilled snowboarder. Vertical air is the maxim 全美数学建模赛 2011 赛题PROBLEM A:Snowboard Course Determine the shape of a snowboard course (currently known as a “halfpipe”) to maximize the production of “vertical air” by a skilled snowboarder.Vertical air is the maximum vertic 英语翻译Our service is aways accompanied with a smile.This standard of excellence is reflected throughout the community.Repairs and maintenance needs are quickly and professionally met by our skilled staff.Vacuuming and mopping are a thing of the 英语翻译Who is the man that is making a speech? What is the man? Who is the man.