在美国，每三十秒就一起诉讼。

There is a lawsuit every 30 seconds in the U. s.

他每次站立的时间没办法超过三十秒。

He can stand up for no more than 30 seconds at a time.

每组图有五处细微的变化！看看你能否把它们全都挑出来，限时三十秒！

Each group has five slight differences. Try to find them out in thirty seconds.