我思考歷史的重量。
She had always been a watcher, a listener, a collector of stories.
可持續(xù)性不是一種選擇，而是一種責任。
孔子說：“吃粗糧、喝白水、彎著胳膊當枕頭，樂也在其中了！缺少仁義的富貴，對我來說，就象天上的浮云。”
The complexity of viruses reminds us how much we still have to learn about biology.