Frequently it has a hinged glass cover to hold copy flat, and may have a removable section in which a transparency holder can be positioned for back-lighting illumination.

一般都备有铰链着的玻璃盖面，以把稿件夹平。有些更可以换上透明片架，在后面打灯照明。

youdao

Removable cab roof section for ease of driving.

可拆卸出租车驾驶执照方便屋顶部分。

youdao

Starting at the back, the removable battery cover has a matte, almost soft-touch finish, save for a plastic section surrounding the camera lens and LED flash.

ENGADGET: HTC Desire X review: one last hurrah for a former flagship?