弹簧门的英文：
swing door
double-acting door

参考例句：

The theatre has a swinging door.
那个剧场的门是弹簧门。

swing是什么意思：
v. 摇摆；大摇大摆地行走；悬挂；转弯；挥舞；使旋转
n. 振幅；摇摆；秋千；音律

"Swing, swing and swing, swing Him (the God of Death or the demon) out, swing Him out.

The pendulum swings on and on.
钟摆不停地来回摆动。

to swing; to flicker; to sway; to waver
摇曳

door是什么意思：
n. 门，门户；途径

The door was unclosed.
门被人打开了。

This door is manual.
这个门是要用手操作的。

Who is knocking the door || Who is knocking || Who is at the door || Who is knocking at the door?
谁在敲门

double是什么意思：
adj. 加倍的；两倍的；双人的；双重的；两面派的
adv. 双重地；两倍地；成双地
n. 两倍；加倍；
v.（使）加倍

to double steal
双盗垒

double steering
双转向

The child birthrate in that area has doubled.
该地区的婴儿出生率已经增加了一倍。