at a guess造句

1、At a guess I should say there were fifty people present
我估计有50人出席。

2、At a guess I should say there were fifty people present.
我估计有50人出席。

3、At a guess I shall say we are speed at fifty miles an hour
我猜测我们正以每小时五十公里的速度在前进。

4、At a guess he's been dead for two days.
据猜测，他已经死了两天了。

at a guess翻译