weather vane造句

1、How did this weather vane of the US economy become a car crash of a corporation?
这个美国经济的风向标是怎么成为一个公司的车祸的？

2、In winter the weather vane often freezes up
气象风向标在冬季经常僵立不动。

3、In winter the weather vane often freezes up.
气象风向标在冬季经常僵立不动。