她父母总是很担心她虚弱的体质。
Her parents are worried about her because of her fragile health.
黑-给虚弱的体质补充能量，提高免疫力。
Black-give weak of the physical endowment add energy and raise immunity dint.
如果他们的体质和免疫系统未因饥饿和营养不足而虚弱，他们本会存活。
They would survive if their bodies and immune systems had not been weakened by hunger and malnutrition.
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