当她把烟吸进肺里时，她的双颊瘪了下去。Her cheeks hollowed as she drew smoke into her lungs.他吸进冰冷的空气。He breathed in the frosty air.我们抬起头,吸进新鲜 、 干净的空气.We lifted our heads to breathe in the fresh, clear air....
P点和Q点分别表示该质点的两个位置.Points P and Q represent two positions of the particle.碰撞并不往往使质点减速.Collisions need not always act to slow particles down.我们可标记占据某个小领域的质点群.We label a group of particles occupying a small neighbourhood....
"I'm afraid he's ill." — "I'm sorry to hear that."“恐怕他生病了。”——“真是遗憾。”She could hear his ragged breathing, as if he had been running.她能听到他不均匀的呼吸声，似乎他是跑着过来的。"I think I hear the telephone ringing."—"Okay, I ca...
Many women achievers appear to pose a threat to their male colleagues...许多事业有成的女性似乎对她们的男同事构成了一种威胁。The skills and logistics of getting such a big show on the road pose enormous practical problems.搞如此大型的巡演，无论是技术上还是物流上都面临着巨...