Well, there were no solar stocks in 1931, so he couldn't quite put his money on it.

好吧，1931 年没有太阳能股票，所以他不能完全投入资金。

The dull man who plays at Monte Carlo puts his money on the colours, and generally black or red turns up; but now and then zero appears, and he loses.

在蒙特卡洛玩球的笨蛋把钱花在了颜色上， 结果通常出现了黑色或红色； 但偶尔出现零， 他就输了。