I have a friend who is a yoga instructor and a friend who is a strength training trainer.

我有俩朋友，一位是瑜伽教练，一位是力量训练教练。

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As an instructor or trainer, you are the one who sees, leads, and perhaps even evaluates the training sessions and performances of your clients.

作为一位指导或训练员，你是负责观察、带领、或许更是评估训练周期和客户表现的人。

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To be technical instructor and trainer of station operators.

向站场操作员提供操作指导和培训。

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