高架起重机正吊起一块块巨大的钢板。Overhead cranes were lifting giant sheets of steel.材料由那台新起重机吊到楼顶.Materials are elevated to the top floor by the new hoist.我们使用起重机将钢琴搬进剧场.We used a crane to lift the piano into the theatre....
Economy deepens the coact that wants economist and mathematician theoretically.经济理论的深化要经济学家与数学家的共同合作.This untutored mathematician had an obsession with numbers...这位非科班出身的数学家对数字特别痴迷。A mathematician or a wit would give you...