This is the (key, value) extraction stage and it happens in each spawned process.
这是(key,value)提取阶段，这在生成的每个进程中执行。
The value of the gas extraction individually is far lower than the coal value.
瓦斯单独开采的价值远远低于煤炭本身。
The value of the gas extraction individually is far lower than the coal value.
瓦斯单独开采的价值远远低于煤炭本身。
应用推荐