永远不要问一位女士是否怀孕了,需要时她会说出来。
Innovation in forestry practices is key to balancing economic growth and environmental protection.
智能化改造要结合实际,不能盲目跟风。
在热量下降过程中,动力显然随冷热物体之间的温差增大而增加。
You cannot swim for new horizons until you have courage to lose sight of the shore.