英语词汇“optional”的读音、翻译、释义、用法及例句-学习网

主要翻译
英语		中文
optional adjadjective: Describes a noun or pronoun--for example, "a tall* girl," "an interesting book," "a big house."*	(not mandatory)	非强制的 fēi qiáng zhì de
		可选的 kě xuǎn de
		选修的 xuǎn xiū de
	There is one compulsory module for this course, then you can choose another three optional modules from the list.
optional adjadjective: Describes a noun or pronoun--for example, "a tall* girl," "an interesting book," "a big house."*	(feature: can be chosen)	可选的 kě xuǎn de
		备选的 bèi xuǎn de
	Air conditioning is an optional extra with this car.

Collins Chinese Dictionary Plus (3rd edition), 2011:

optional ['%p$&nl] adj 可选(選)的 kěxuǎn de

在这些条目还发现'optional'：

在英文解释里：

add on - bolt-on - elective - forced - nonobligatory