翻译和例句：
and vision problems. “求救信号”也可说distress signal。 国际上常用的“求救信号”是SOS，它并非任何单字的缩写，只是因为其莫尔斯电码“...－－－...” 在电 ……
Where is my dog? No worries.新发明的“宠物定位器”能够通过卫星信号显示宠物所在的位置。So your dog will never get lost. ……
这可不是普通的手机哦。It can send alarms to your parents. There is a "help" light on the phone. 遇到危险时按下求救按钮，手机就会自动发出求救信号。 ……
为什么人伤心会哭？Your brain4 knows when you feel sad. It sends a message (发信号) to your body to produce (产生) tears. Some scientists think crying may be good for us. It helps us feel better after. ……
为什么海豚会跃出水面？Dolphins jump to breathe (呼吸) air. Compared with (与……相比) swimming, jumping carries them far by using less energy4. It is also a good way to signal (发信号) to other dolphins. ……
red flag危险信号The fallen trees along the road raised a red flag for the safety inspectors.对于安全巡查员而言，沿路倒下的树木是一个危险信号。tip-off提示，暗示The judge called for a pitcher of water, a tip-off that the session would ……
.释义：At the drop of a hat从字面上来解释就是：一旦帽子落地。这个说法可能来自以前的决斗，帽子落地是一个信号。在决斗的时候，中间人一般都是举着帽子，然后突然把它往地下一扔，作为决斗双方可以开始开枪的信号。现在at the drop of a hat这个俗语已经和决斗没有关系了，它的意思是：立刻，马上，有些细微的信号就行动。现学现用：Colin: I’m throwing ……
. Then the headgear passes the electric signals (电子信号) to robots. They follow the orders and copy ……
乖乖跟着你跑的旅行箱。PULLING a big suitcase around is tiring. The Hop suitcase saves you that trouble. It’s made by a company in Spain. It receives signals (信号) sent from your mobile phone and follows you ……
found that it is because whenever the octopus senses their own skin, they release a chemical signal (化学信号 ……
signals (信号) to your stomach. Clever! ……
外星人可通过手机信号绘制地球文明地图外星人可通过手机信号绘制地球文明地图Cellphones are everywhere. We never think about how they work... our cellphone signals (信号)?Cellphones are everywhere. We never think about how they work ……
in California.The system can get signals (信号) from seismometers (地震仪). If the signals show that an... signals (信号) from seismometers (地震仪). If the signals show that an earthquake is coming, the system ……
;traffic light 信号灯traffic jam 交通拥堵traffic accident 交通事故 traffic light 信号灯 ……
in China. You have to put your hand out, ring the bell or press the signal button (信号按钮).21st ……
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