Adjustable speed
[化] 可调速度
🧩 词语组成解析
speed
[spid]
n. 速度;快速;昌盛;（汽车的）变速器，排挡;
vt.& vi. 急行，加速;
vi. 超速;加速;迅速前行;兴隆;
vt. 加快…的速度;使成功，使繁荣;
🗣️ 情景例句
And if you ever need Dad or me to help you ...
如果你们的确需要我和爸爸的帮助的话 ……
Where will they be going for their holiday?
他们休假时要上哪去？
He was just falling asleep when there was a loud knock at the door.
他刚要入睡，就有人很响地敲门。