Leadtime
n. 投产准备阶段；超前时间
🗣️ 情景例句
No. Please endorse the check at the back.
不会的。请在支票的背面签名。
Do not sell the bear's skin before you have caught the bear.
熊未到手休卖皮（勿过早乐观）。
As a matter of fact, it is the other way around.
事实上，情况正好相反。