It is necessary to "cut one'steeth" on the non-glamorous parts of a field.
在一个领域中尝试做一些不那么光彩照人的工作来获得经验是有必要的。
2
It is a bad form to pick one'steeth in public.
在公众前剔牙是一种不良习惯。
3
Yes, this one's a bit boring, but what could be worse having to grit your teeth and stare through a big, ugly scratch on your Kindle's display every time you have a read?