懂你英语 Level6 Unit1 1 Harry's Injury

On Antarctica, the world's coldest continent, the average high temperature is -49 degrees Celsius. In the summer, the sun never sets, and in the winter, it never rises. Keeping sane there is its own special challenge.The McMurdo Station is a research base perched on the ...

In many cases, these types of injuries are due to overuse of a part of the body.For example, runner's knee is a painful condition associated with running, while tennis elbow is a form of repetitive stress injury at the elbow.Other types of injuries, such as a broken bone...

On April 26, 1986, Unit 4 of the Chernobyl nuclear reactor in northern Ukraine, then a part of the Soviet Union, was shut down for an unauthorized safety test. When the nuclear fuel rods hit the cooling water, the fission reaction accelerated out of control due to a sudden ...