He knows how to use a gun proficiently.

他知道如何熟练使用枪支。

The test examines whether students have mastered the basic knowledge proficiently.

考试考察学生是否熟练掌握了基本知识。

The rhetoric is proficiently used in the book.

书中熟练地运用了修辞手法。

We can't use chopsticks proficiently.

我们不太擅长用筷子。

If you pass proficiently, perhaps you'll play professionally.

如果您通过熟练，也许你会发挥专业。

Language Skills: Ability to write and speak English proficiently.

语言要求：有良好的英语读写能力。

Although not a diplomat, he can proficiently use diplomatic terms.

他虽然不是外交官，却能熟练地使用外交辞令。

It's difficult to keep several languages proficiently under your belt.

同时使用几种语言是很困难的。