code: function _parsePhonetics ($containor) {
    const phonetics = []
  
    $containor.find('.pronounce').each((index, item) => {
      const html = $(item).html()
      const content = removeTagsAndSpaces($(item).html())
  
      debug(`phonetics parse html: ${html}`)
      debug(`phonetics parse content: ${content}`)
  
      if (!content) {
        return
      }
  
      const data = content.split(' ')
      let phonetic
  
      // 有可能出现只有一个音标的情况，例如: keyword
      if (data.length > 1) {
        phonetic = new Phonetic(...data)
      } else {
        phonetic = new Phonetic('', ...data)
      }
  
      debug('phonetics object: %O', phonetic)
  
      phonetics.push(phonetic)
    })
  
    return phonetics
  }
docs: 提取音标