肾虚的英文：
deficiency of the kidney ;deficiencyofthekidney

deficiency是什么意思：
n. 缺乏，不足，短缺，缺点；缺陷

Deficiency in vitamins/Vitamin deficiency can lead to illness.
身体缺乏维生素就会生病.

His education is deficient.
他缺乏教养。

Scurvy (or vitamin C deficiency)：Nutritional disorder caused by deficiency of vitamin C.
坏血病(亦称维生素C缺乏病):因维生素C缺乏而引起的营养性疾病。

kidney是什么意思：
n. 肾脏；脾气，性格

kidney of bovine animals
牛属动物腰子

Each man has a pair of kidneys.
每个人有一对肾脏。

Kidney failure (or renal failure )：Partial or complete loss of kidney function.
肾功能衰竭:肾脏功能部分或全部丧失的一种病理状态。