Since the cord connecting the two blocks is inextensible, the accelerations are the same.由于连接两物块的绳子无伸缩性, 因此它们的加速度相同.Power socket for connecting PW 10 , Compartment for detergent tablets , Defoamer metering.拥有清洁剂箱和除泡剂计量箱....
热带风暴“马可”正沿佛罗里达海岸向北推进。Tropical storm Marco is pushing northward up Florida's coast.马可波罗游记中提到忽必烈曾派使节到马尔加什.Marco Polo's travelogue mentions that Kublai Khan sent envoys to Malgache.据说，13世纪时，马可·波罗在去爪哇岛的途中在太平洋上航行过。M...