| n (pl -bys) 用法:
1 person or thing available as a substitute or in an emergency 後备人员; 备用的事物:
Aspirin is a good stand-by for headaches. 阿司匹林是必备的头痛良药. *
[attrib 作定语] a stand-by ticket, ie a cheaper type of airline ticket available when not all the tickets for a flight have been sold 剩余机票（因未事先售出而价廉）. 用法:
2 (idm 习语) on `stand-by in a state of readiness 待命状态:
The troops are on 24-hour stand-by, ie ready to move within 24 hours of receiving the order. 部队待命24小时（接到命令後24小时内可行动）.
stand by
(a) be present but not do anything 袖手旁观:
How can you stand by and let him treat his dog like that? 他那样虐待他那只狗, 你怎麽能袖手旁观呢?
(b) be ready for action 准备行动:
The troops are standing by. 部队正严阵以待. stand by sb support or help sb 支持或援助某人:
I'll stand by you whatever happens. 无论如何, 我都支持你. stand by sth be faithful to (a promise,etc) 信守（承诺等）; 遵守:
She still stands by every word she said. 她仍然信守自己说的每一句话. |