兔子正睡觉时,乌龟赢得了比赛.The tortoise wins the race while the hare is sleeping.乌龟以极其缓慢的速度爬行着.The tortoise crept along at an agonizingly slow speed.那只乌龟跟那头象相比就显得很小.The elephant dwarfed the tortoise....
A cold is an infection of the upper respiratory tract.感冒是上呼吸道的感染。She produced a feminist tract, "Comments on Birth-Control", in 1930.她1930年写了篇女性主义的短文《论节育》。A vast tract of land is ready for development.一大片广阔的土地可待开发。...