Instead of keyboard characters, your face or your fingerprint would be used to unlock your online accounts.

你的面容或者指纹将取代键盘字符来解锁在线账户。

That's right. When we use emoticons—facial expressions made out of keyboard characters—we can signpost the feelings we intend.

没错。当我们使用表情符号——用键盘上的标点组成的符号时，我们就可以表达出所要表达的情感。