Note: parameters shown in Angle brackets are optional; parameters or options shown in normal brackets () are required and must be provided.

注意：尖括号中的参数为可选参数；方括号()中的参数或选项为必需参数，必须提供。

youdao

The AWWA standards usually contain options that must be evaluated by the user of the standard. Until each optional feature is specified by the user, the product or service is not fully defined.

AWWA标准包含由用户自己评判的选择，除非用户指定标准，否则就不充分定义产品或者服务。

youdao

We're told to expect an oleophobic Gorilla Glass screen with a standard XGA (1024 x 768) resolution, options for 16GB, 32GB or 64GB of storage, optional WWAN, an accelerometer, gyroscope, light sensor, microphone and a battery that'll last for around eight hours in ideal circumstances.

ENGADGET: HP / Palm's 9.7-inch Topaz tablet to use 1.2GHz Qualcomm MSM8660, Adreno 220 GPU