• 1. keep a firm hand: 牢牢地控制着
• 2. keep a firm hand on: 牢牢控制 | 紧紧控制 | 严密的控制

• 1.On the other hand, we had to keep a firm eye on the new and strategic initiatives we were pursuing.
  另一方面，要紧盯我们正在从事的新的战略目标。
  dict.yoduao.com

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