人教版新教程（2019）必学一的Unit 4 Natural Disaster的Listening andTalking部分，听力中有这么一句话（介绍地震来袭时在室内应该怎么样自我保护）：
Drop down onto your hands and knees, cover your head with your hands,and stay away from glass, windows or anything that could fall.
请问这里的 Drop down onto your hands and knees 是哪种一个动作？drop这里的意思是？
Drop down onto your handsand knees, cover your head with your hands, and stay away from glass, windowsor anything that could fall.
类似如此的动作：
附: Listening and Talking 听力原文
Teacher:Thankyou, Mrs Fors,That was a great presentation !Class, do you have any questionsfor Mrs Fors?
Student1: Mrs Fors, Ithink you're a hero, And Lucky is very cute. I'd like to know what we can do TOPrevent natural disasters.
MsFors: Well, there's noway to prevent earthquakes and storms. But if we prepare, we can keep them frombecoming disasters that kill or injure people. To be ready, we should make asafe list of what to do, where to go, and who to contact.
Student1: So what shouldwe do if there's an earthquake?
MsFors: Remember to drop,coves and hold on. Drop down onto your hands and knees, cover your head withyour hands, and stay away from glass, s, or anything that could fall. You couldfind cover under a desk or table . Hold on to the desk and table so it doesn’tmove away from you.
Teacher:Whatshould we do if were outside when an earthquake happens?
MsFors: Go to an openspace away from buildings, trees, or power lines.
Student2: Andwhat about after an earthquake?
MsFors: Well, if you're trapped, you can use a cell phone to call or text forhelp. You can also tap a pipe or a wall, or whistle for help. That way Luckyand I can find you!
Student2:I have a question for Lucky. Do you like being a rescue dog?
MSPors: Lucky, what do you say?
[Sound of dog barking twice]
Teacher: I think he sayshe's a lucky dog.