Every four levels, you have a bonus screen where your challenge is to push tiles in order to correctly display the picture of some famous physicists.
每个四个水平，你有一个红利荧屏你的挑战要哪里推动砖瓦为了要正确的显示一些出名的物理学者的照片。
We shed skin constantly — each of us replacing our outer layer of skin every two to four weeks — and all of those skin flakes may help reduce levels of certain pollutants in indoor environments.
我们的皮肤在不停地剥落——每个人每两到四周就会更换一次表层皮肤——而所有那些脱落的皮肤可以帮助减少室内环境中的某些污染物含量。
For the purpose of demonstration, I've implemented four levels, ranging from blocking nothing to blocking every new window.
为了演示的目的，我已经实施了四个级别，从阻止无关阻止每一个新的窗口等。
应用推荐