alternates

词形变化：

副词: alternately | 名词: alternateness | 动词过去式: alternated | 动词过去分词: alternated | 动词现在分词: alternating | 动词第三人称单数: alternates |

同义词：

interchange | alternating | substitute | alternative | every other | surrogate | every second | swap | rotate | fluctuate | vary | swing | stand-in | fill-in | sub | switch | take turns | spell | take | turns | intermittent | change | flip | jump | flip-flop | tack | understudy | replacement |

反义词：

opposite | consecutive |