准备一些罐头食品，几管牙膏，玩具，鞋子等等。把它们藏在你的房子周围，让你的孩子去寻找。
Hide items such as tins of food, tube of toothpaste, toys, shoes etc. around your house and let your kids find them.
清道夫。准备一些罐头食品，几管牙膏，玩具，鞋子等等。把它们藏在你的房子周围，让你的孩子去寻找。
Scavenger hunts. Hide items such as tins of food, tube of toothpaste, toys, shoes etc. around your house and let your kids find them.
管这种屏幕离你的视网膜之有几毫米远，但只要焦点选择正确，你仍旧可以看到清晰的图片。
This screen is a few millimeters away from your retina, but as long as the focus is right, you can still see a clear picture.
例如，典型的功率二极管和功率晶体管有很高的反向压降几百到几千伏和几微安到几毫安的漏电流。
For example, the typical power diodes and the power transistors have high reverse voltages in hundreds to thousands of volts and microamps to milliamps through them in the off state.
卡尔加里的马鞍形标识使用了1800英尺的红色LED管，即使在几英里之外也能看到。
The Calgary Saddledome uses 1,800 feet of red LED tubing that can be seen for miles.
卡尔加里的马鞍形标识使用了1800英尺的红色LED管，即使在几英里之外也能看到。
The Calgary Saddledome uses 1,800 feet of red LED tubing that can be seen for miles.
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