Emissions
n. 排放物( emission的复数形式 ); 散发物（尤指气体）
🗣️ 情景例句
It might be simpler and less expensive .
这样可能比较简单而且省钱。
The post office is two blocks straight ahead, You can't miss it.
那邮局一直向前走过两条街，很好找。
Are you free later today, Mr. Green?
您今天晚些时候有空吗，格林先生？