This module should be used as optional in case of session module.

在使用会话模块的情况下，应将这个模块用作可选模块。

youdao

Notice how one of the steps—adding a middle name—is marked as optional.

注意其中一个步骤 — 添加中间名字 — 是如何被标记为可选的。

youdao

The source and server-side metadata models are defined as optional packages.

源模型和服务器端元数据模型被定义为可选包。

youdao

However, the QCA said 35% of schools were already presenting the subjects as optional.

BBC: NEWS | UK | Education | Language teaching 'too boring'

The multimedia system COMAND Online with internet access, navigation and LINGUATRONIC voice control is also available as an optional extra.

ENGADGET: Mercedes-Benz introduces B-Class Electric Drive, we go eyes-on

The G-wagen also gets into step with the latest generation of Mercedes's infotainment and Internet systems, as well as safety tech such as (optional) adaptive cruise control, parking assist and blind-spot assist.

WSJ: Mercedes-Benz G63 AMG Review: Civilians Shouldn't Salute It | Rumble Seat by Dan Neil