to fold sth down
1.+ corner of page折下；翻下
a thousand pages folded down and glued折了角并粘在一起的1,000页
2.+ buggy, chair折叠；折起
With the front seat folded down, a back-seat passenger can lie almost flat out.前排座椅折起后, 后排乘客几乎能平躺了。
You'd have to fold a buggy down to put it in the rear compartment.你得把婴儿车折叠起来才能放进后备厢中。