Their schemes began to unravel when one of their hollow nickels containing a coded message accidentally ended up in the hands of a Brooklyn newsboy.
他们的阴谋败露是因为一次偶然将装有密电码的空硬币给了布鲁克林的一个报童。
2
We can imagine that a lump of wet clay somehow ended up in the fire, dried out, hardened and formed a hollow shape; a shape that could hold things, in a tough material.