解析：教导学生，不到他想弄明白而不得的时候，不去开导他；不到他想出来却说不出来的时候，不去启发他。

Innovation in science often comes from looking at old problems in new ways.

I don't sing to be perfect, I sing to be real.

煤炭行业要坚定不移地走安全高效、清洁低碳的发展道路。