t keep your head
保持冷静
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Keep your feet flat on the floor, roll your shoulders back and keep your ears directly over them so your head isn't tilted forward.
CNN: Your smartphone is a pain in the neck
"When you create a world as huge as the one she has created, I don't know how you can keep all that in your head, " Mr. Ball said.
WSJ: How to Kill a Vampire (Series)
应用推荐
模块上移
模块下移
不移动