宇宙不断给我们带来惊喜,这正是科学如此令人兴奋的原因。
The energy sector is the backbone of any economy, and its stability ensures national security.
过去是一个陌生的国度;他们做事的方式不同。
学得越多,就越意识到自己知道的有多少。
We can distinguish the blurred shapes and colours we see at a distance only because of the capacities of our eyes.