色多多在线观看播放-色多多在线观看高清免费-色多多在线观看视频-色多多在线看-欧美aaaaa性bbbbb小妇-欧美aaaav免费大片

解釋：使用毒性大的藥物治療疾病時，病情十成中只能去掉六成就要停藥，以免傷害正氣。

Topological insulators are a prime example of how theoretical predictions can lead to experimental discoveries that reshape our understanding of the physical world.

Running a business requires patience, not short-term gains.

One is not born, but rather becomes, a woman.

The best fruits come from respecting nature's timing.