If you aren't in over your head, how do you know how tall you are?
The heart of the educator must be a living flame, a fire that can ignite the souls of the young.
广泛地学习,专心致志,恳切地求教,多思考当前的实际问题,仁德就在其中了。
能源转型不仅仅是从化石燃料转向可再生能源;它关乎确保所有人的能源安全和可负担性。