expertise后直接加s吗？
的有关信息介绍如下：
"expertise" in English is best used as an uncountable noun英文“专长”用作不可数名词She has a lot of expertise.She has expertise in editing.She has expertise in editing and proofreadingShe has expertise in both editing and proofreading.Sally and Simon both have expertise in editing.Sally has vast expertise in editing.
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