Know how to train fleas. Fleas are conditioned that they can only jump a certain height. Likewise, man along the way, conditioned himself on his own limits.

了解如何训练跳蚤。跳蚤认为他们只能跳到特定的高度，同样的，人也会认为自己只能达到某个极限。

youdao

Know how to train fleas. Fleas are conditioned that they can only jump a certain height. Likewise, man along the way, conditioned himself on his own limits.

了解如何训练跳蚤。跳蚤认为他们只能跳到特定的高度，同样的，人也会认为自己只能达到某个极限。

youdao