And now we're at the advent of an entirely new phase returning samples, an aspirational goal that has been with the science community for decades.

而且现在我们处于一个全新的阶段，即带回样本，这是科学界几十年来梦寐以求的目标。

The little girls were delighted at the advent of a stranger, some one from very far away, they knew by his clothes, his gloves, and the sharp, pointed cut of his dark beard.

小女孩们很高兴看到一个陌生人的到来， 一个来自很远很远的人， 她们从他的衣服、他的手套和他黑胡子的锋利、尖锐的切口知道。