查询词典 optional attribute

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。。。

StabiliTrak is standard on DTS and optional on DeVille and DHS.

标准配置的Stabilitrak是DTS和国土安全部的Deville和可选的。

New for 2004New heated and cooled front seats come standard on the DHS and DTS and are optional on the DeVille.

为2004New新的加热和冷却的前排座椅的标准配置的国土安全部和DTS，并在德维勒可选的。

Feet: a single or double dewclaw may be present on the rear feet. removal of rear dewclaws, if present, optional.

足：一个或是两个的悬趾可能会出现在后足上，可选择于出生后切除。

Don not attempt to do something which you can not to do.

不要企图做那些办不到的事情。

The expression of CTGF and TNF-αweredetected by immunochemistry and the number of Clara Cells was calculated.

光镜下观察肺组织的病理变化，采用免疫组化染色观察肺组织中结缔组织生长因子和肿瘤坏死因子-α的表达和Clara细胞的数量。