1. The remaining syllables are unstressed. 其它的音节都是非重音。
2. We begin by considering a spherical element in an unstressed body. 现在从考察一无应力物体中的圆球形单元体开始讨论。
3. To mark tones with tone marks in pinyin (marks appear on top of the vowels except for an unstressed syllable, where no mark is used). 今天老师留的作业是给中文拼音标调。