Other parts include a flap which appears to be a giant SIM card cover, but actually opens up to let you look at the circuitry inside.
其他改装包括一个看似像SIM卡盖，但实际上是可以打开以查看内部电路的翻盖。
2
They have a large flap of skin that they use as a mask to cover their face when they sleep.
它们长有一大片的皮瓣，在睡觉时可用作遮脸的罩子。
3
You should be able to "read" the back cover of the book, check out the book flap, see the cover art, and easily (and impulsively) drop the book in your cart and wander to the checkout line.