It costs a bit more than I wanted to spend.
它比我预计的消费高了一点。
There's room for another one if you move up a bit.
如果你挪开一点，这里还可以容纳多一个人。
You need to work on your pronunciation a bit more.
你需要再加把劲改进发音。
She has bitten her nails down to the quick.
她咬指甲都咬到了活肉。
He's been bitten by the travel bug.
他迷上了旅游。