Ominously, car sales slumped in August.8月份的汽车销量暴跌，这可不是个好兆头。The bar seemed ominously quiet.酒吧里非常安静，给人一种不祥的预感。The wheels scooped up stones which hammered ominously under the car.车轮搅起的石块,在车身下发出不吉祥的锤击声....
Braving the biting wind, she went out to beg from door to door.她不顾寒风刺骨, 出去挨门乞讨.He begged from door to door.他沿门讨饭.They went from door to door to advise the residents on how to store their vegetables.他们走门串户去指导居民如何贮藏蔬菜....
表面贴装开关二极管. 75五,反向电压整流电流250毫安.Surface mount switching diode . Reverse voltage 75 V. Rectified current 250 mA.目前沉船的NPN开路集电极晶体管, 单通道二五〇毫安最高.Current sinking NPN open collector Transistor, Single channel, 250 mA max.低内阻原理也同样适...