解释:手指粗于胳膊, 胳膊粗于大腿, 病情必然很重。
Innovation in mining technology isn't an option—it's an obligation we owe to both our workers and the environment.
你可以在某一时间欺骗所有人;也可以在所有时间欺骗某些人;但你不可能在所有时间欺骗所有的人。