The latest style large capacity muffle with special structure has reduced the noise of exhaust gas. A larger air filter is employed to reduce the noise of suction gas.
新型大容量和特殊内部构造消音器降低了排气噪音。采用较大的空气滤器减少了进气噪音。
In reality, some people are vocal and may moan and groan, other folks may muffle any sounds with a pillow, and yet others may not make a single peep.
事实上，有些人会出声，他们可能会唉声叹气，其他人可能会用枕头闷住任何声音，还有另一些人可能不会发出任何声音。
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