筷子是两根长而薄、通常尾端渐缩的木材。
Chopsticks are two long, thin, usually tapered, pieces of wood.
它具有与激励模相同的传输常数，但幅度却以芯径渐缩的速率衰减。
It has the same transmission constant as the exciting mode, but its amplitude reduces at the decreasing ratio of core radium.
为了更好地解决饱和温度下蒸汽凝结水的热量回收利用问题，设计了一种渐缩流通面积换热器。
To more efficiently make use of the heat from the condensed water at saturated temperature, one kind of heat exchangers with gradually shrunk flowing area was developed.
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