大拇指规则是：如果你首先获取了一个市场，或者创造了一个新的市场，那你领导位置几乎是不可能丢失的。

The rule-of-thumb was that if you captured the marketplace first, or invented a new marketplace, it was almost impossible to lose your leadership position.

youdao

这种大拇指式的规则并不总是有效。

This rule of thumb won't work in every case.

youdao

这种大拇指式的规则并不总是有效。

This rule of thumb won't work in every case.

youdao