Ergocalciferol at high levels also is toxic to chickness.高水平的麦角钙化醇对鸡也是有毒害的.Food additive -- Vitamin D 2 ( Ergocalciferol )GB14755 -1993 食品添加剂维生素D2 ( 麦角钙化醇 )...
这钻机有变速控制。The drill has variable speed control.该装置本身就在车子正下方，几乎与变速杆处于同一直线上。The device itself was right under the vehicle, almost in line with the gear lever.你拐角时要换挡变速.You have to shift as you drive around the corner....
He looked straight ahead and overtook a lumbering lorry.他眼睛直视前方，加速超过了前面一辆慢吞吞行进的大卡车。Generally speaking, lumbering brings the economic efficiency for the locality.总的来说, 伐木业为当地带来经济效益.Though relatively non - aggressive, thes...