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。...
They battled against other Indian tribes, but rarely fought with the whites.他们同其他印第安部落作战,但很少与白人并肩对敌。He fought his bravest ( war ).他打得最勇敢.She has fought a constant battle with her weight...她一直在竭力控制体重。Watkins sued the Army...