These sound waves bounce back off the foetus, helping to create a 'picture' of the child on a screen.
这些声波在遇到胎儿时会被弹回,胎儿的“照片”也就能显示在屏幕上了。
The "trolls" argue that by making patents valued they are helping to create a market in invention that will encourage inventors.
“钓饵”公司分辩说,它们这么做是让专利受到重视,借此帮着建立一个鼓励发明者的发明市场。
The idea behind microfinance is to empower borrowers by helping them build a business which can create income and grow.
VOA: special.2010.06.16
and he asked me if I would be interested in coming on the board and helping to create a website
他问我是否愿意参加,帮助建一个网站等等。
A free-rider uses the public good without helping to create or support it.
VOA: special.2009.03.03
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