Stand-by
[计] 备用设备, 准备, 备用\\n[化] 备用的; 储备的; 辅助的
📖 牛津释义
stand-by
n (pl -bys)
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）.
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）.
🏥 医学释义
①备用品 ②准备
🧩 词语组成解析
stand
[stænd]
n. 台，看台;立场;停止;抵抗;
vi. 站立，起立;竖直放置;保持看法;停滞;
vt. 使站立;忍受;抵御;承担责任;
vt.& vi. 站立，（使）直立，站着;
by
[baɪ]
prep. 在…旁边;表示方式;由于;经过;
adv. 经过;表示保留或保存时用;短暂拜访;
🗣️ 情景例句
OK. Let me repeat it.
好吧。让我重复一遍。
They've been divorced.
他们已离婚了。
He turned to the police officer.
他转过身对警官说