预约成功
build up逐步建立，增进，增强
burn the midnight oil开夜车
burn down烧毁
burn off烧掉
burn out(火自行)熄灭;烧光某物
burst into闯进;突然开始
burst out (doing )爆发
but for 要不是
burst on突然出现，到来
burst out突然起来，大声喊叫
be used to习惯于
burn down烧毁
burn up烧毁
by accident偶然，碰巧
by air坐飞机
by all means当然可以
by and by不久，过一会儿
by and large总的来说
by chance偶然，碰巧
by comparison与…相比较
by contrast with和…相对比
by day/night在白天/晚上
by far…得多，尤其，显然地
by force凭借暴力，强迫地
by means of用，靠
by mistake出于误会
by no means并没有，决不
by oneself单独，独自
