★ portable (a.) a.便于携带的，手提式的
The new portable computers are going like hot cakes.
新的便携式计算机卖得很快。
★be supposed to 应该, 被期望
He was supposed to give us advice, but this ideas were airy-fairy ideas.
他应该给我们提些劝告，但他的主意都是不切实际的。
★trail mix 高能量食品的混合物，比如干果，杏仁和巧克力，旅行者常将之当做小吃
