叶轮可用角钢制成.The vanes are made of structural angle iron.这种装置的运转情况与叶轮泵很相似.This device operates similarly to the vane pump.叶轮有开式 、 半闭式和闭式三种, 如图 2-2 所示.Impeller are open, and closed three - Banbi, as shown in Figure 2 - 2 ....
Everyone underestimates the and special feeling of the ultimate happiness.每个人都低估了快乐的极限.However, he underestimates the scale of the problem...然而，他低估了问题的严重性。However, he underestimates the scale of the problem.然而，他低估了问题的严重性...
I thought the play was only mediocre.我认为这部戏剧只是平庸之作。Virginia was a perfectionist. She was just not prepared to settle for anything mediocre.弗吉尼娅是个完美主义者，她根本不愿意拿任何普普通通毫无特色的东西将就。Only lazybones and mediocre persons could hank...