The following one-syllable prefixes are usually unstressed .

以下的单音节前缀通常不重读。

So " his " is unstressed , the other words are stressed .

所以“his”是不重读的，其他的词就重读。

The remaining syllables are unstressed .

其它的音节都是非重音。

Make the stressed syllables strong , and the unstressed syllables weak and quick .

注意重读音节要强有力，非重读音节要轻而快。

It may also occur in utterances at the expense of some unstressed vowels .

语音脱落也可以在语句中发生，往往是某些非重读元音发生脱落。