The sky is the limit, and you know that.

The discovery of odorant receptors and the organization of the olfactory system has opened up new avenues for research in neuroscience and biology.

"The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

告诉我动机，我会告诉你结果。

The greatest threat to democracy is not from external enemies but from internal decay and the loss of civic virtue.