The reason the lisp is often written with a th-sound is that it's pretty impossible to write a fronted [s] with a normal keyboard.

口齿不清经常被误写为th音的原因是因为用一个普通键盘打出前移s音太困难了。

youdao

I'm always confused with "s" and "th".

我常把s和th搞混。

youdao

On the basis of inheriting the excellent tradition of Poussin and Lorrain s landscape in 17 ~ (th) century, he promoted French realism landscape oil painting forward to a new height.

他在继承了17世纪普桑、洛兰风景画优秀传统的基础上，将法国现实主义风景油画推进到一个新的高度。

youdao

Here's the problem. How do I get to the nth- er, the k'th element in the list, in this case?

如何找到第n个元素呢-,在这里，如何找到第k个元素呢？

麻省理工公开课 - 计算机科学及编程导论课程节选