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1·We were working on the eleventh floor.

我们在第11层工作。《柯林斯英汉双解大词典》

2·Students can gain valuable experience by working on the campus radio or magazine.

学生们通过在校园广播台或校刊工作能够获得宝贵的经验。《柯林斯英汉双解大词典》

3·He is working on the inventions in human health.

他致力于人类健康方面的发明。

4·I have three oxen working on the farm.

我有三头公牛在农场里工作。

5·Nowadays, scientists are working on improving health care robots.

如今，科学家们正致力于改进医疗机器人。

6·Family Health International has been working on public health issues since 1971.

国际家庭健康组织自1971年以来一直致力于公共健康问题。

7·He is working on a new novel.

他正在写一部新小说。《牛津词典》

8·She's outside, working on the car.

她在外面修理汽车。《牛津词典》

9·Linda spends all her time working on the garden.

琳达用所有的时间在那座花园里劳作。《柯林斯英汉双解大词典》

10·He hasn't said he'll do it yet, but I'm working on him.

他还没说他会做这事，不过我正在设法说服他。《牛津词典》