Artificial dentures must be kept clean to keep their beauty and to preserve the health of your mouth.
人工做的假牙必须保持清洁，以便它能看得好看，并且，保持你口腔健康。
Your mind is and precious asset. You must protect it and keep it clean, clear and focused on what you want, rather than allowing it to be polluted by the negative influences around you.
心灵是最重要和最珍贵的资产。你必须尽力保护，维持其纯净透澈，同时要专注于自己向往的事物，不受周围消极因素的影响。
You must protect it and keep it clean, clear and focused on what you want, rather than allowing it to be polluted by the negative influences around you.
你必须保护它同时保持它的纯洁，清楚的关注你想要的，而不是让消极影响你并污染你的心灵。
The oceans are important to all animals on the Earth. We must keep them clean. We must stop polluting them.
海洋对于所有的地球上的动物都有着极其重要的意义。我们要保证清洁，禁止污染。
It can pollute plants, sometimes it can kill lots of fish. We must keep our environment clean and tidy.
它可以污染植物，有时它可以杀死大量的鱼，我们必须保持环境整洁。
Participants must keep the performing venue clean and clear any litter before departure. Participants shall eat and drink in the authorized area and time only.
学员必须爱护排练及演出地点的一切设施并保持场地清洁，学员只能在指定场地及时间进食。
Note: when using this engine must be thoroughly clean the surface of the dirt and keep dry in order to achieve a real effect.
使用本品时，必须将引擎表面的污垢彻底清洁干净并保持干燥才能达到真正的功效。
You must protect it and keep it clean, clear and focused on what you want, rather than allowing it to be polluted by the negative influences around you.
你必须尽力保护，维持其纯净透澈，同时要专注于自己向往的事物，不受周围消极因素的影响。
To keep the forum clean and neat, your signature MUST NOT exceed 5 (five) lines (of the default forum's font size).
为保持论坛界面的整洁，个性签名中不得超过5个默认字体行距。
To keep the forum clean and neat, your signature MUST NOT exceed 5 (five) lines (of the default forum's font size).
为保持论坛界面的整洁，个性签名中不得超过5个默认字体行距。
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