虽然他还不确定确切能减少多少，但他很确信产生的效果足够对解决全球变暖产生帮助。

Exactly how big that dent would be, he is not yet sure. But he is pretty sure it would be big enough to help.

youdao

虽然他还不确定确切能减少多少，但他很确信产生的效果足够对解决全球变暖产生帮助。

Exactly how big that dent would be, he is not yet sure. But he is pretty sure it would be big enough to help.

youdao