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1·She heard him let out a pitiful, muffled groan.

她听到他发出一声可怜、压抑的呻吟。《柯林斯英汉双解大词典》

2·A measured, muffled snore issued from Aunt Polly's chamber.

波莉姨妈卧室里传出一阵匀称的、沉闷的鼾声。

3·She muffled the child up in a blanket.

她用毯子将孩子裹得严严实实。《牛津词典》

4·His voice was pitched high, the words muffled by his crying.

他的嗓门提得很高，说的话都被他的叫喊声压得听不清了。《柯林斯英汉双解大词典》

5·Grandpa's voice sounded muffled.

爷爷的声音听起来很低沉。

6·A muffled sound of voices floated up from the far end of the graveyard.

一阵低沉的说话声从墓地飘了过来。

7·Baby crocodiles have a sort of muffled cry while they are in their nest.

小鳄鱼在它们的窝里会发出一种低沉的叫声。

8·They waited a time that seemed an age, and then the same muffled boom troubled the solemn hush.

他们等了一段时间，仿佛等了一个世纪，然后，同样低沉的轰隆声打破了肃穆的寂静。

9·The church clocks strike with a muffled sound.

教堂的钟敲出低沉的响声。《新英汉大辞典》

10·Too bad the sound is so muffled.

不过耳塞的音效有点不清晰，这太可惜了。

(1)muffle furnace马弗炉；隔焰炉；回热炉