4 sentences

1. 她发出微弱的抗议。

   tā fā chū wēi​ruò de kàng​yì.

   She let out a weak protest.

   Source: CCMatrix

2. 挑战是这些声音非常微弱。

   tiǎo​zhàn shì zhè​xiē shēng​yīn fēi​cháng wēi​ruò.

   The challenge is that these sounds are very faint.

   Source: CCMatrix

3. 他的脉搏很微弱。

   tā de mài​bó hěn wēi​ruò.

   His pulse is very weak.

   Source: OpenSubtitles

4. 起初我只能听到发动机微弱的噪音。

   qǐ​chū wǒ zhǐ​néng tīng dào fā​dòng​jī wēi​ruò de zào​yīn.

   I could only hear the faint noise of the engine at first.

   Source: CCMatrix