specialties

词形变化：

动词过去式: specialized | 动词过去分词: specialized | 动词现在分词: specializing | 动词第三人称单数: specializes |

同义词：

specify | concentrate | focus | major in | study | specialise | particularize | narrow down | particularise | narrow | speciate | differentiate |

反义词：

diversify | generalize |