a simple substance 单纯的物质
Simple Substance of Hydrogen 单质氢
a simple substance mixture 单纯的物质
Metallic Simple Substance 金属单质
Drinking water throughout the day is an important habit to pick up. For your health, give this simple substance the importance it deserves.
全天候饮水补水是个必须养成的重要习惯。为了你的健康，给予这个简单物质足够的重视吧。
Drinking water throughout the day is an important habit to pick up. For your health, give this simple substance it deserves.
全天候饮水补水是个必须。为了你的健康，给予这个简单物质足够的重视吧。
For your health, give this simple substance the importance it deserves.
为了你的健康，给予这个简单物质足够的重视吧。
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