過動兒與自閉症的英文

過動兒
Attention Deficit Hyperactivity Disorder
(ADHD)

自閉症
Autism

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"deficit" is a countable noun.

definition:
1.the amount by which a sum of money falls short of the required amount.(短缺、不足)
2.the amount by which expenditures or liabilities exceed income or assets.(赤字、虧空)

example:
政府財政赤字 government finance deficit
外貿逆差 foreign trade deficit
國貿逆差 international trade deficit

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還有一個和deficit接近的字，叫deficiency
也有不足、短缺之意，不過還可以用在短缺的數額上，
例如：
a deficiency of $500
五百元的資金缺口

另外，常聽到的「缺鈣」可以說成：a calcium deficiency