在健康的耳朵上，耳垢可以随表皮的运动向外排出，具有清洁作用并防止污物在外耳道堆积。
In a healthy ear, the wax is moved externally by movement of the epidermis, providing a cleansing action and preventing accumulation in the auditory canal.
使用减压调整器或单个的控制阀来安全地从钢瓶中排出气体。采用止回阀，防止回流入钢瓶。
Use a pressure reducing regulator or separate control valve to safely discharge gas from cylinders. Use a check valve to prevent reverse flow into the cylinder.
特别是其中一种叫做表儿茶素的物质，似乎对人体排出自由基特别有效，从而帮助人体保留细胞膜并防止心血管疾病。
One in particular, called epicatechin, seems especially effective in helping the body get rid of free-radicals, which may help preserve cell membranes and ward off cardiovascular disease.
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