how on earth短语¹³⁹⁷⁰ 基本例句 adv.究竟如何 But Herman, how on earth could you possibly know that？ 但是赫尔曼,你怎么会知道这事的？ ebigear Those of you that have only ever used column agglutination technology may wonder how on Earth we ever got any decent results from the above techniques. 对于那些只用过柱凝集技术的研究人员可能很难想象我们利用上述技术能得到什么样的成果。 ausbio