| 释义 |
sig·nal¹ /ˈsɪɡnəl/ n. | vt. | vi.
I n.
1. 信号；暗号
Signals are made by day with flags and by night with lights. 信号在白天用旗，在夜晚用灯发送。
The train stopped at the red signal. 列车遇红灯而停车。
He made a signal with his arm for a left turn. 他伸出手臂示意要向左转弯。
The signal was to be the dropping of a handkerchief. 约定的暗号是丢下一块手帕。
code of signals (海军的)旗语通信手册
2. 导因；近因；导火线 (for)
His scolding was a signal for the girl to start crying. 他的严厉责备使那女孩哭了。
The rise in prices was a signal for social instability. 物价上涨引起了社会动荡。
3. 标志；表示
as a signal of respect 作为尊敬的表示
4. 【电子】信号
an area with a poor television signal 电视信号不良的地区
5. 【铁】信号机
a railroad crossing signal 铁路道口信号机
6. 交通指示灯，交通信号灯，红绿灯
7. 【牌】信号(指为搭档提供某种信息的叫牌或出牌)
8. [signals](橄榄球赛中四分卫等叫出的表示特定打法或防守队队员叫出的示意调动位置的)号，号数
II (-nal(l)ed; -nal·(l)ing)
❶ vt.
1. 向…发信号；用信号与…联络；用信号示意
We signal(l)ed a passing ship for help. 我们向一艘过往的船发了求救信号。
He signal(l)ed the car to stop by raising his hand. 他举起手示意汽车停下。
2. 用信号表示；用信号传递(信息等)
The bugler signal(l)ed a retreat. 号兵吹号通知撤退。
The bell signals that the class is over. 铃声表示下课时间已到。
3. 是…的标志，标志着；(非正式地或间接地)表明
The defeat of 1066 signal(l)ed the end of Saxon rule in England. 1066年的失败标志着撒克逊人对英格兰统治的结束。
U.S. economic indicators signal the dollar should be lower than current rates. 美国的经济指标表明美元应低于目前的汇率。
❷ vi.
发信号；打信号；用信号联系
The ship signal(l)ed for a pilot. 该船发信号要求派引水员来。
He signal(l)ed for the waitress to come over. 他招手叫女服务员过来。
She signal(l)ed for quiet. 她示意大家安静。
[<OFr seignal < ML signāle < SIGN + -AL²] |