(of a door or gate) closed but not locked
（門）關(guān)著但沒鎖上
let yourself in, the door's on the latch.
你進(jìn)來吧，門沒鎖。
(of a breastfeeding baby) manage to get its mouth into the correct position around the nipple
（哺乳嬰兒）用嘴叼到乳頭
attach oneself to (someone) as a constant and usually unwelcome companion
糾纏
he spent the whole evening trying to latch on to my friends.
他整個晚上都糾纏著我的朋友。
understand the meaning of (something)
理解，明白
[with clause]she'll soon latch on to what is happening.
她很快就會理解發(fā)生了什么。
To get hold of; obtain
取得；得到
latched on to a fortune in the fur trade.
在皮毛生意中賺了一大筆錢