西欧人也已经发明并且使用了磁罗盘，当云彩同时遮住了太阳和星星时，它就能起作用。
Western Europeans had also developed and put into use the magnetic compass, which helped when clouds obliterated both the Sun and the stars.
为了保护他人，请戴上口罩，咳嗽或打喷嚏时遮住口和鼻子。
To protect others, please wear a mask, and cover your mouth and nose when coughing or sneezing.
成龙提高听力水平的方法是看电视时遮住电视下方，这样他就看不到字幕了。
He improved his listening comprehension by covering the bottom of the television so he couldn't read the subtitles.
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