中文翻译instruction是什么意思

例句：

Each candidate is given instruction in safety.

每位候选人都被给予了安全指导。

This technique brings life to instruction and eases assimilation of knowledge.

这种技术给教学带来活力，并使知识的`吸收更加容易。

Two lawyers were told not to leave the building but no reason for this instruction was given.

两位律师被告知不要离开这座建筑，但没被告知这一指示的原因。