twinning什么意思解释？

The twinning of Leeds and St Mary was formalised at a function held last week.在上周举行的典礼上，利兹市与圣玛丽市正式缔结为姐妹城市。Gross crystalline imperfections like twinning are apparent to the unaided eye.粗的晶体不完整性,如孪生体可用肉眼看出.Identical twinni...

twinning的音标：twinning的英式发音音标为：['twɪnɪŋ]twinning的美式发音音标为：['twɪnɪŋ]...