Optional stop
[计] 选择停机, 条件停机, 随意停机
🧩 词语组成解析
stop
[stɑp]
vi. 停止;中断;逗留;（使）停止工作;
vt. 塞住;堵塞;阻挠;止付;
n. 停止;（管风琴的）音栓;停车站;（管风琴的）音管;
🗣️ 情景例句
You may be offered coffee, and then you should immediately announce the reason for your visit.
他们会给你冲咖啡，然后你应该尽快说明来意。
I'm always disappointed when I don't get any mail.
当我收不到任何邮件时，我总是很失望。
they can locate and steer clear of obstacles -- or locate flying insects on which they feed.
并能通过回声来确定并躲开障碍物，或找到它们赖以为生的昆虫。