| 41. | A red light is usually a signal of danger. |
| 红灯通常是危险的信号。
|
| 42. | The ship signal (l)ed her position hourly. |
| 该船每小时用信号报告一次它的位置。
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| 43. | Sailors signal with flags by day, and with lights at night. |
| 水手们白天用旗子夜晚用灯光发信号。
|
| 44. | He stopped the car at the signal . |
| 他看到信号就停了车。
|
| 45. | He was tagged by cops for driving through a stop signal . |
| 他因闯过停车信号而给警察在车上贴了违犯交通规则的条子。
|
| 46. | amplify the sound, electric current, signal |
| 增强声音, 电流, 信号
|
| 47. | recognize a tune, an old friend, a signal |
| 听出一首听过的曲子, 认出一个老朋友, 识别一个熟悉的信号
|
| 48. | flash a signal (to sb) with one's car headlights |
| 用汽车前灯(给某人)发信号
|
| 49. | a weak light, signal , sound |
| 微弱的光线, 信号, 声音
|
| 50. | a signal made with a red flag |
| 用红旗打出的信号
|