化学药剂以 1∶1∶100 的波尔多液, 50%退菌特可湿性粉剂600倍液和50%代森铵800倍液防治效果较好. The best fungicides are 1 % Bordeaux mixture, 50 % Tuzet ( diluted 600 times ), and 50 % Ambam ( diluted 800 times ).
With a low-pitched rumbling noise, the propeller began to rotate.伴随着隆隆的低沉噪声，螺旋桨开始旋转起来。The engine turned a propeller.发动机使螺旋桨旋转起来。The freighter fouled its propeller in fishing nets.货船的螺旋桨被渔网缠住了。...
The hydrogenation can be controlled to produce any degree of hardness desired in the product.为了生产所需要的任何硬度的产品,可对氢作用加以控制.Its hydrogenation activity in aromatics saturation and ring opening activity were investigated.芳烃加氢饱和...