I rode a hydrofoil ferry across the bay this morning.今天早上我驾驶快艇驶过海湾.Why can a hydrofoil move on a layer of air?为什么气垫船能靠后方的气流移动?The hydrofoil soon speeded up.那艘水翼船不久就增加速度....
The human race has enough weapons to annihilate itself.人类有足够的武器灭绝自己。The philosopher speculated about the future of the human race.那位哲学家考虑过人类的前途.Can the human race carry on expanding and growing the same way that it is no...