optional的中文翻译是什么意思
optional
adj. 可选择的，非强制的
optional的柯林斯释义
ADJ可选择的；非强制的
If something is optional, you can choose whether or not you do it or have it.
A holiday isn't an optional extra. In this stressful, frantic world it's a must...
休假并非可有可无。在这个紧张而忙碌的世界，它是必不可少的。
Sex education is a sensitive area for some parents, and thus it should remain optional.
性教育对某些家长而言是个敏感领域，因此应该保持其非强制性。
optional的英文释义
Adjective
1. possible but not necessary; left to personal choice
optional的场景例句
Airfield: 4 Firehawks, which is enough to destroy an opposing Tech are optional.
机场: 4个火鹰, 这足够您摧毁敌人得高科了,云层推进升级可选.
Appends the specified element of List ( optional operation ).
在列表尾部添加指定元素 ( 可选操作 ).
The appearance of two new optional color effect: soil and grass green bronze.
对于外观,有两种新的效果色可选: 土青铜色与草绿色.
On lesser amounts, insurance is recommended but optional and taken out at your request.
在少许数额, 保险被推荐但任意和被去掉根据您的请求.
However, the alt attribute is optional and may be omitted from particular image elements.
然而, alt的属性是可选的,甚至是可以忽略的.