Do not expectorate on the sidewalks.

不要在人行道上吐痰。

He began to expectorate small amounts of blood streaked sputum.

他开始有少量带血丝的痰。

He began to expectorate small amounts of blood-streaked sputum.

他开始有少量带血丝的痰。

He began to expectorate small amounts of blood - streaked sputum.

他开始有少量带血丝的痰。

As Tom wended to school after breakfast, he was the envy of every boy he met because the gap in his upper row of teeth enabled him to expectorate in a new and admirable way.

当汤姆吃过早饭去上学的时候，在路上遇到的每个孩子都羡慕他，因为他上排牙齿的缺口能够使他用一种新的方法吐唾沫。