commutable 是什么意思

	adj. 可以交[互]换的；可以折换[抵偿]的。 offences not commutable by fine 不能用罚款折换刑罚的罪行。

subject to alteration or change; "the death sentence was commutable to life imprisonment"

capable of being exchanged for another or for something else that is equivalent
同义词：substitutable,

	1.	A pension is often commutable into a lump sum 养老金常可改为一次性总付款。
	2.	A commutable prison sentence 可减刑的监狱判决
	3.	Inland river navigation is an important component of comprehensive transportation system . it has no commutable advantages and actions in transporting bulk cargo 内河航运是我国综合运输体系中的重要组成部分，在大宗货物运输中具有不可替代的优势和作用。

commutable是什么意思