• 1. performed operations: 实施手术
• 2. Operations performed: 执行的操作
• 3. operations performed on dependent variables: 信号本身或信号之间的运算

更多释义

• 1.Once he performed operations for 69 hours without stopping and saved 112 people.
  有一次，他连续做手术69个小时，救了112个人。
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• 2.Once, he performed operations for 69 hours without stopping, and saved 112 people.
  有一次，他连续做了69小时手术，救了112人的性命。
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• 3.The Australian eye specialist Peter Graham, known as a "Lightbringer", visited China in 1991, during which he performed operations for several patients with eye disease and restored their eye sight.
  1991年，被誉为“光明使者”的澳大利亚眼科大夫格拉翰姆访问中国，为多名眼疾患者进行手术，使他们重见光明。
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