The question is not whether the thing exists, but whether it has any essence which is capable of existence without us.
Energy security is a crucial guarantee for national development. We must intensify technological innovation to enhance the efficiency of oil and gas exploration and production.
作家必须是他或她时代的见证者,必须见证世界的不公和苦难。
数学研究是一次进入未知的旅程,每一次发现都为新的谜题打开了大门。
I think the biggest lesson I've learned is to trust your instincts.