英语翻译have many problems such as low yields (

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英语翻译
have many problems such as low yields (

narrow scope of aminoalcohols意思是：
（产生的）氨基醇的应用范围很狭窄.意思是说该反应会产生一些不必要的或没有利用价值的产物即氨基醇.
再问：我的乙醇胺是反应物，不是产物。
再答：你的意思是这里的aminoalcohols是指乙醇胺？如果这样的话，narrow scope of aminoalcohols意思是：乙醇胺的活动范围很狭窄。意思是说乙醇胺活动范围狭窄，不易与另一个反应物充分接触？
因为没有上下文，我也只能这样猜猜大意了。

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