n.蠓虫；蚊；蚋；琐事

There is a gnat bite on my hand. 我的手上有个小虫叮的包。

You need not sing to me like a gnat to profound that question. 你用不着象蚊子那样哼哼唧唧地提出这个问题。

Then a single gnat got into his ear and stung him. 然后，一只小蚊蚋跳进他的耳朵，蜇了他。

He's always straining at a gnat. 他总是对小事很拘谨。

Don't strain at a gnat and swallow a camel. 不要拘小而疏大。