Soul food is a varied cuisine: it includes spicy gumbos, black-eyed peas, and collard greens.黑人的食物可谓五花八门：有辣味的秋葵汤，有豇豆，还有羽衣甘蓝叶。In the greengrocers' there are varieties of greens.菜市场里有各种各样的蔬菜。The greens are full of fib...
Methane and propane are alkanes.甲烷和丙烷是烷烃。The general uses of alkanes may be divided into three categories.烷的一般用途可分为三个方面.The straight - chain alkanes exacerbate the problem of engine " knock ".直链烷烃使机器的 “ 爆震 ” 问题更加严重....
因为天气暖和，戴维只穿了一件白色的棉衬衣。Because it was warm, David wore only a white cotton shirt.用一根棉签把轮廓抹花。Smudge the outline using a cotton-wool bud.多数小地毯是简单的棉质方块垫。Most of the rugs are simple cotton squares....