“上弦”怎么读？

“上弦”的反义词：下弦。...

她会给小提琴上弦.She can string a violin.该给表上弦了.It's time to wind your watch.上弦月是新月和满月的中间状态.A first - quarter moon is halfway between new moon and full moon....

“上弦”的英语可以翻译为：[天] first quarter ，wind up a clock or watch，principal rafter ...