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optional

美 [ˈɑpʃən(ə)l]英 [ˈɒpʃ(ə)nəl]

adj.可选择的；选修的
n.〈美〉选修科
网络非强制的；可选的；可以任选的

optional

optional

搭配反义词

adj.+n.

optional course,optional subject,optional unit

权威英汉双解英-汉英-英网络释义

optional

adj.

1.可选择的；选修的that you can choose to do or have if you want to

1

The new lock-in offer is part of a series of optional add-ons airlines have been rolling out in an effort to increase revenue .

这个全新的票价锁服务是其中一个航空公司为了增加盈利而推出的一系列附加服务选项。

2

The owner of each end point decides how much optional information to provide with the endpoint URL .

每个端点的所有者决定端点 URL 提供多少可选信息。

3

After a join hint is specified , the INNER keyword is no longer optional and must be explicitly stated for an INNER JOIN to be performed .

指定联接提示后，要执行 INNERJOIN 时，INNER 关键字不再为可选，而必须显式说明。

4

In some smaller restaurants with fewer people dining , like the case of a couple of diners , the measure's adoption could be optional .

有一些小餐馆就餐人数比较少，比如一两个人、两三个人，可以有一些随意的情况。

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This optional view appears at the bottom edge of a screen and contains segments that activate different modes in the application .

这个可选控件出现于应用程序的页面底部，用于切换程序的不同状态。

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If you don't want the active rule to be reevaluated, you should include the rule's optional no-loop attribute and give it a value of true .

如果不希望这种情况发生，则应该包括 rule 的可选 no-loop 属性并将其赋值为 true 。

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An optional step at this point may be to create a link aggregation device , commonly referred to as the LNAGG device .

（这里有一个可选步骤 ——创建一个链路聚合设备，通常称为 LNAGG 设备）。

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Beside this , we must take account of the fact that in China breathing seems to be optional .

除此之外，我们还要考虑到这样一个事实：在中国，新鲜空气是可有可无的。

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This update is optional and simply provides a more up-to-date definition of messages that are considered to be junk or not junk .

此更新是一可选件，只提供用于判断邮件是否为垃圾邮件的最新定义。

14

"Moving three evictions , optional neighbouring states, " the importance of education has always been a traditional Chinese virtue .

“孟母三迁，择邻而居 ”，重视教育一直是中国的一个传统美德。

15

That noted , it seems to me that optional tips are an attractive way of doing business.

鉴于此，我觉得随意小费制是个有吸引力的办法。

16

It has much more sharply tapered edges , and a new, optional, white color adds to the sense of lightness .

它的边缘削得更厉害，新增的、可选的白颜色使它看起来更轻。

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sed takes a script of any number of commands followed by an optional input filespec; by default, it reads standard input .

sed 接受包含任何数量命令的脚本，后面跟着可选的指定输入文件的选项；缺省情况下，它读取标准输入。

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They had a special offer for a Sony VAIO, which had a very nice large screen and space for an optional second battery .

他们有一个 SonyVAIO 的特别提供，它有一个非常好的大萤幕以及额外的第二颗电池的空间。

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The position of the front wheel turning table(optional part )is adjustable so that the side slide plate can be fit for more cars .

前轮转角（选购件）位置可调，加长双级后轮滑板，适合各种车形。

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Implementations must support texture sizes at least up to 256 , which is one of the optional properties in M3G.

部件必须至少支持 256 的纹理大小，这是 M3G 的一个可选属性。

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"Optional " fees are being applied to elements that used to be included in base prices . Some are easy to avoid , others not so easy.

“任选 ”费用被应用到曾经包含在基础价格中的部分，有的容易避免，有的却不能。

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