查询词典 optional

Design features like built-in filter slots, combined with optional accessories such as direct-attach cuvette holders, make sampling simple.

像内置过滤槽的设计，与可选择附件如直接试管固定器的组合，使取样简单。

This is described in Optional Data for Traffic Assignment.

这些详见分配模型中可选的数据。

It shows that, apart from the usual elements for the tree root and feature type, a datum plane contains the positioning constraints and an optional fit type.

它展示了，除了通常的树根和特征类型等元素，一个基准平面包含位置约束和一个可选配合类型。

A floating literal consists of an integer part, a decimal point, a fraction part, an e or E, an optionally signed integer exponent, and an optional type suffix.

浮点文字量由整数部分，小数点，小数部分，e或 E，可选的有符号整数指数，以及可选的类型后缀组成。

There is also an optional third argument giving the default avatar image file to display if the comment author doesn't have one.

如果评论作者没有avatar，可选择的第三个参数会显示默认的avatar图像。

Other than the difference with default values for optional arguments, you should assign a default when a passed argument has a null value.

和PHP不同的是可选参数，你需要比较它是否是空的，再赋给它一个默认值。

All other methods are optional and you could not define them if you don't need.

所有其他的方法是可选的并且如果你不需要的话你可以不定义他们。

Where item is an expression, delimiter is a delimiter and end is an optional closing expression.

这里 item 是一个表达式，delimiter 是一个分隔符而 end 是一个可选的结尾表达式。

Software Description: Weather Signature enables you to create dynamic email signatures that include the current weather conditions for your city, along with optional jokes, images and your personal information.

Weather Signature 让你可以创建包括带有笑话，图像以及你的私人信息的你的城市当前天气状况的动态电子邮件签名。

This kind is mixed desultorily optional encode, lack pair of shoes kind maintain of the product truly definitely, those who lack a times is successional the consistency with the industry, to the shoe kind product and development evolution.

这种杂乱无章和随意的编码，缺乏对鞋类产品的准确认定，缺乏时代的连续性和行业的一致性，对鞋类产品及发展沿革。。。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。