查询词典 optional course

They look optional, but I don't know whether to install or not.

他们期待可选的，但是我不知道是否要安装或没有。

All 1/4 valves shall have optional field installable male thread and tubing end connector adapters.

所有DN8阀门应该配置备选现场安装的外螺纹和管状端口连接适配器。

The Nokia N900 has 32 GB of internal storage, which is expandable up to 48 GB via optional microSD cards (up to 16 GB in size).

诺基亚 N900拥有 32 GB的内部存储，这是可扩充至48 GB的通过可选的microSD卡（高达 16 GB的大小）。

Depending on the joggle theory,the paper gives the face equation of annulus worm of turning and milling optional drive ratio,first kind and second kind limited curve.

这里依啮合原理给出了车削变齿距环面蜗杆的齿面方程和磨削的环面蜗杆齿面方程、一类及二类界限曲线。

The optional Sport Package includes sports buckets seats with enhanced side support and are finished in highly distinctive leatherette materials or Boston leather.

择运动包体育水桶席位增强方的支持，并建成极富特色人造革材料波士顿或皮革制品。

Definition: Lexically, a QName consists of an optional namespace prefix and a local name.

定义：从词法上说，一个 QName 由一个可选的命名空间前缀和内部名称组成。

While the liability coverage is required by law, in many cases collision coverage is optional.

而责任保险是法律规定的，在许多情况下，碰撞的范围是可选的。

Although most US states require you to carry a minimum amount of liability coverage, other types of coverage are usually optional.

虽然大部分美国国家需要你进行最低限度的责任保险，其他类型的涵盖范围通常是可选的。

Hours are required to qualify to sit for the licensure examination and 200 are optional free hours.

16时10分须有资格参加执照考试和200名是可选的免费时间。

There are also optional floor stands which lift the speaker box off of the ground.

也有一些可选楼的停机位，即解除议长票房过的地面上。

Methods Clinical data of 3 cases of bile duct injury during laparoscopic cholecystectomy were analyzed retrospectively.

回顾总结3例LC术中胆管损伤的临床资料，分析3例胆管损伤的原因及对策。

These techniques are applied to the gobang.

本文将这些技术用于五子棋中。