machinery可數(shù)嗎?

　　例句：

　　They set the machinery in motion.

　　他們將機(jī)器開動起來。

　　What skills are needed to operate this machinery?

　　操作這種機(jī)器需要什么技能？

　　The contract clearly specifies who can operate the machinery.

　　合同明確規(guī)定誰可以操作機(jī)器。

　　There is no machinery for resolving disputes.

　　根本沒有解決紛爭的機(jī)制。

　　There was a whirring of machinery.

　　有機(jī)器發(fā)出的嗡嗡聲。