But there was a problem. Transits of Venus are rare.

但有个问题，金星凌日很难得。

That's because these transits of Venus don't happen often.

这是因为这次的金星凌日不会经常发生。

No problem, I've a flight that transits in Bangkok, is that ok?

没问题，我这里有一班在曼谷转机的，可以吗？

Transits over a natal planet bring it into focus, make it more personal.

经行出生行星时会使其成为焦点，更个人化。

But it does provide the opportunity to watch multiple transits of Saturn's moons.

但是这就增加了观测土星卫星多重掩星的机会。