非利士人向以色列人摆阵。两军交战的时候，以色列人败在非利士人面前。非利士人在战场上杀了他们的军兵约有四千人。

And the Philistines put themselves in array against Israel: and when they joined battle, Israel was smitten before the Philistines: and they slew of the army in the field about four thousand men.

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两人同一地点向同一方向前进，小军先跑30秒，多长时间小涛追上小军？

Two people goes ahead toward with a direction with a place, the small army runs 30 seconds first, how longtime small billows overtakes the small army?

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