Some oscillation of the fuselage had been noticed on early flights.在之前的几次飞行中，就已经察觉到机身有些摇晃。Its oscillation depends on the strength of the gravitational field.它的振动幅度取决于引力场的强度。the oscillation of the compass needle罗盘指针的摆动...
英格兰意欲在下月的世界青年锦标赛中推出他们的最强阵容。England intend fielding their strongest team in next month's World Youth Championship.英格兰队在锦标赛中连赢两场后信心大增。England are brimming with confidence after two straight wins in the tournament.他今年第...