two half-gallon cartons是什么意思是两个（半加仑）,还是两个半加仑?

two half-gallon cartons是什么意思是两个（半加仑）,还是两个半加仑? SAT问题：Milk costs x cents per half-gallon and y cents per gallon. If a gallon of milk costs z cMilk costs x cents per half-gallon and y cents per gallon. If a gallon of milk costs z cents less than 2 half-gallons, which of the following equation half of two times two 英译中 I one two half six luggage cart cart是什么意思 cart是什么意思 roller cart cart是什么意思? It's half past two.中文是什么 Two And A Half Men中文翻译 '' Two boy ,half a boy.'' 的意思 two half man 到第几季了 - years ago ,I came to the USA.Two and a half Two and half a Two a half Half and two He has been there for__A two and a half month B two and a half months C two and the half months D two and half a month The huge elephent weights____.A two tons and a half B.two and a half ton C.half and two tonDtwo ton and a half two hours and a half two and a half hours有什么区别 Shall we at half past two?改为同义句＿ ＿ at half past two?