Technological development should serve humans, not replace them.
办丧事虽有一定的礼仪,但还是以哀痛为本。 
一切能被说出的都能够清楚地被说出,而我们不能谈论的,必须保持沉默。
Mental activity is always directed toward some end.
The next generation of forest leaders must be as comfortable with biodiversity metrics as they are with profit margins.