up-down

英 ['ʌpd'aʊn] 美 ['ʌpd'aʊn]

• adj. 升降

例句

用作形容词 (adj.)

1. Window cleaners are pulled up and down tall buildings on cradles.
   窗户清洁工乘坐能升降的吊篮清洗高层建筑物的窗子。
2. The Looper Thread Take-up can make it up and down for threading easy.
   升降式底线分线盘，使穿线更容易。