be down

• 情绪低落

be down的用法和样例：

例句

1. Visibility was down to 100 metres in the fog.
   大雾中能见距离已降至100米。
2. It is easy to see how even a family which had had as good food as it wished and a few extras could be down to bread and scrape the barrel inside a month if the "demon drink" took hold.
   即使是一个本来想吃得好些就能吃得好些、尚有盈余可供某些别的开支的家庭，倘若嗜上酒来，则在不到一个月的时间里，就可以穷落下来，以致只能吃面包及必须掏尽家底，不难明白这种现象究竟是怎么回事。
3. I'll be down in half a tick/in two ticks.
   我马上就下来。
4. A gentleman should not be down on others whatever happens.
   一位绅士无论发生什么都不应对人家生气。