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1·He was carrying a briefcase.

他提着公文包。《柯林斯英汉双解大词典》

2·The briefcase flopped onto the desk.

公文包重重地落在桌上。《柯林斯英汉双解大词典》

3·He rifled through his briefcase and extracted a file.

他在公文包内搜索一番，取出一份文件。《牛津词典》

4·I traced the course of the river on the map spread out on my briefcase.

我在自己公文包上铺展开的地图中勾画出了这条河的流向。《柯林斯英汉双解大词典》

5·He shifted uncomfortably on his feet. In doing so he knocked over Steven's briefcase.

他不自在地变换着站姿。在这过程中，他碰倒了史蒂文的公文包。《柯林斯英汉双解大词典》

6·He doesn't conform to the usual stereotype of the businessman with a dark suit and briefcase.

他不同于人们一般印象中穿黑色西装、提公文包的商人形象。《牛津词典》

7·My briefcase was in my car.

我的公文包在我的车里。

8·He had left his briefcase at home.

他把公文包忘在家里了。

9·But how did you lose your briefcase?

但你是怎么弄丢你的公文包的？

10·I've lost my briefcase.

我的公文包丢了。

公文包

1·He was carrying a briefcase.

他提着公文包。《柯林斯英汉双解大词典》

2·I traced the course of the river on the map spread out on my briefcase.

我在自己公文包上铺展开的地图中勾画出了这条河的流向。《柯林斯英汉双解大词典》

3·He shifted uncomfortably on his feet. In doing so he knocked over Steven's briefcase.

他不自在地变换着站姿。在这过程中，他碰倒了史蒂文的公文包。《柯林斯英汉双解大词典》

4·But how did you lose your briefcase?

但你是怎么弄丢你的公文包的？

5·He looks like any other businessman, wearing a suit and carrying a briefcase.

他看起来跟其他商人一样，身着西装，带着一个公文包。

公事包

1·Do you think my briefcase is big enough to put in all these stuff?

你觉得我的公事包够装所有这些东西吗？

2·I was to in a hurry that I left my briefcase at home.

我太匆忙了，以致于将公事包留在家里。

3·Where is my briefcase?

我的公事包在哪里？

4·Janice: Have you seen my briefcase? I put it on the couch hours ago.

珍妮丝：你有看到我的公事包吗？几个钟头前我才放在沙发上的。

5·Ill take this briefcase (attache case) with me.

我自己拿这件公事包(小型手提箱)。