Tutorial page "Lifting State Up" demo can give incorrect boiling verdict

Because the Boiling verdict uses the temperature in celsius , if the user puts in fahrenheit 211.9999 this will incorrectly report that it will boil. This is because the conversion to celsius is limited to 3 digits and gets rounded up to 100.

A fix for this is to change BoilingVerdict to accept scale and temperature and the code to do a slightly different check for each:

function BoilingVerdict(props) {
  if (props.scale === 'c' ? props.temperature >= 100 : props.temperature >= 212) {
    return <p>The water would boil.</p>;
  }
  return <p>The water would not boil.</p>;
}

        <BoilingVerdict
          scale={this.state.scale}
          temperature={this.state.temperature} 
          />

I know that I could do a fork and pull request but this is about as far as my interest in this subject goes so anyone else is free to fix this admittedly tiny issue.

从“Lifting State Up”教程页面开始，找到 BoilingVerdict 组件及其用法。检查略低于 212 的 Fahrenheit 值对应的判定，然后更新该组件，并确认 211.9999 不会报告为沸腾，而阈值仍然会报告为沸腾。