士兵们用尖木桩围成了临时防御工事。

The soldiers built a temporary barricade with sharp wooden ___pickets.

将军派了两个哨兵去监视边境的情况。

The general sent two ___pickets to monitor the border situation.

罢工期间，工人们在公司门口设置了纠察线。

Workers set up a ___picket outside the company during the strike.