The seat tilts forward, when you press this lever.
按这个控制柄，座位就向前倾斜。
《牛津词典》
2
If the light flashed on and off several times, the dolphins were supposed to press the left-hand lever followed by the right-hand one.
如果灯亮了又灭了好几次，海豚就应该先按左手的杠杆，再按右手的杠杆。
3
The levers and light were set up in exactly the same way except that this time it was only Doris who could see the light indicating which lever to press first.