The final (optional) element of the sequence gives the values of the syntactic functions, adjuncts and specifiers (in any order, distinguished by their role names).
- 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。
These are shown per person per night with each park listing but these passes are optional, so you don't have to buy them.
the task also has a start node, however, this node is optional and does not change the execution semantics of the task, which can only begin execution when the input is available.
The meaning of OPTIONAL is involving an option : not compulsory. How to use optional in a sentence.
微控制器实验是选修的。 2. Our school provide you with various elective / optional courses. 我们学校提供各式各样的选修课程。 3. A discrete collection of bytes comprising at least one header and optional user data. 一个离散的字节集合，包含至少一个头部和用户选项数据。
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