531. The bird nests only in northeast, northwest, southeast and southwest lest it be found.
此鸟只在东北、西北、东南和西南筑巢，以免被发现。
nest [nest]
n.巢，窝 vi.筑巢
lest [lest]
conj.唯恐，免得
– Beware your hat, lest it should be blown away. 当心你的帽子别被吹走。
532. The airport and seaport are important to import and export of portable goods.
机场和海港对于进口和出口轻便商品很重要。
portable [ˈpɔ:təbəl]
a.便于携带的，手提式的，轻便的
– The new portable computers are going like hot cakes. 新的便携式计算机卖得很快。
533. On the porter’s passport a portion of the portrait isn’t proportional.
在搬运工的护照上，部分肖像不成比例。
porter [ˈpɔ:tə]
n.搬运工人；看门人，大楼管理员
portion [ˈpɔ:ʃən]
n.一部分，一份 vt.分配，把…分给
– He divided up his property and gave a portion to each of his children. 他把财产分给子女, 每人一份.
portrait [ˈpɔ:trit]
n.肖像，画像
proportional [prəˈpɔ:ʃənl]
a.(to)比例的，成比例的
– Payment will be proportional to the amount of work done. 酬金将与工作量成比例.