betwixt
adv, prep (idm 習語) betwixt and between in an intermediate position; neither one thing nor the other 居中; 非此非彼; 模棱兩可
It's difficult buying clothes for ten-year-olds at that age they're betwixt and between. 很難給十歲的孩子買衣服--這種年齡說大不大, 說小又不小.
??? 情景例句
I did both with Richard and Susan,
有Richard和Susan時我這樣做,
The ancient Roman civilization was finally destroyed by the nomadic tribles.