他们一直在用小麦交换棉花和木材。

They have been bartering wheat for cotton and timber.

《柯林斯英汉双解大词典》

当时她正在用牙线剔牙。

She was flossing her teeth at the time.

《柯林斯英汉双解大词典》

尤金正在用香槟和覆盆子果泥调制罗西尼鸡尾酒。

Eugene was concocting Rossini Cocktails from champagne and pureed raspberries.

《柯林斯英汉双解大词典》

So instead of having 20% of people's time spent on their own projects, I make people hang out with each other.

我让大家都待在一块儿,而不是将那20%的时间，用在自己的工作上。

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But still is very professional and you can use it in any setting, business or casual.

但它也同样可以是很专业的表达，可以用在商务或是生活的各种语境。

Is it okay 课堂 - SpeakingMax英语口语达人

And there are a lot of questions that people are asking in using the Star Festival as a model.

人们在用“七夕“这一模型的时候,问着许多的问题。

麻省理工公开课 - 媒体、教育、市场课程节选