But small reserves can become a death trap.

但是狭小的保护区可能成为危险之地。

youdao

There is a law between the upgrading relations from trap reserve to possible, to probable and to proved reserves.

圈闭、预测、控制、探明储量之间的升级转化关系，具有一定的规律性。

youdao

There is a law between the upgrading relations from trap reserve to possible, to probable and to proved reserves.

圈闭、预测、控制、探明储量之间的升级转化关系，具有一定的规律性。

youdao