Mark watched him ma-levolently.马克恶狠狠地盯着他。The Queen unveiled a plaque to mark the official opening of the hospital.女王主持揭幕式，标志着医院正式启用。It's surely overstepping the mark to behave so rudely to your guests.你对客人如此粗鲁真是太过分了...
Two hawks were hover ing overhead.两只鹰在头顶盘旋.These hawks are magnificent in flight, soaring and circling for long periods...这些鹰飞行能力极其出色，可以长时间在空中翱翔和盘旋。Hawks will not pick hawks' eyes out.本是同根生，相煎何太急。Hawks and other rap...
Ther result shows that the mechanism is probably that the electrostatic field polarizes the catalase solution.研究表明:高压静电场对酶活力的稳定作用很可能是高压静电场使酶及溶液发生极化作用产生的.For particulates, the favored devices are inertial impactors, cyclo...