There are only a chance

And then there are the familiar conundrums: the rule is no jaywalking, but only by jaywalking will I have a chance of saving the dog that is about to be hit by a car.

于是就有了类似的难题：规定说不能乱穿马路，但我必须乱穿马路才有机会救下那条要被车撞到的狗。

You're going to get a chance to explore them, and you'll see not only are there the standard numerics for strings, there are things like length or plus or other things you can do with them.

以后你们还会学到更多，你会学到字符串，不仅仅能运用标准数值运算，你还可以对他们求长度，或者加上其他的东西。

The probe's batteries are now drained, and there is only a minute chance that it will power up when the sun is high in the sky again later this year.

探测器的电池现已耗尽，年末太阳高照的时候，电池再次发电的希望尚存。