The timing of the attack, and its motivations, are unknown.袭击发生的时间及其动机尚不清楚。He hailed this week's arms agreement but in the same breath expressed suspicion about the motivations of the United States.他为本周达成的武器协议而欢呼，但同...
尽管他身形庞大，移动起来还是很灵巧。Despite his bulk he moved lightly on his feet.这个炉子底下带轮子，很容易四处移动。The stove is on wheels so it can be shuffled around easily.大多数移动机器人仍处在设计阶段。Most mobile robots are still in the design stage....