5岁，所有的牙齿上都有牙垢，一些牙发生磨损。
By 3-5 years: All teeth may have tartar build-up and some tooth wear.
用了这种特效的牙膏，小孩蛀牙发生率可能会下降。
By using this kind of special toothpaste, children may decrease the rate of tooth decay.
蛀牙发生时，牙齿受到攻击，酸，这可以发生在两个方面。
Tooth decay happens when teeth are attacked by acid, and this can happen in two ways.
3 - 5岁，所有的牙齿上都有牙垢，一些牙发生磨损。
By 3-5 years: All teeth may have tartar build-up and some tooth wear.
美国当时因为西班牙对古巴的殖民政策问题而与西班牙发生冲突。
The U. S. was fighting against Spain over Spain's colonial policies with Cuba.
信仰与现代性之间的冲突再次在西班牙发生，这两个势头都很强烈。
This clash between faith and modernity, both very lively, is happening again today in Spain.
欧洲央行和其他人需要做好防范比利时，意大利和西班牙发生危机的准备。
The ECB and others should stand ready to defend Belgium, Italy and Spain if need be.
1918年西班牙发生大规模流感时曾经出现这种情况，导致世界上数百万人死亡。
That happened with the so-called Spanish flu of nineteen eighteen which killed millions worldwide.
之所以要这样做，因为她以及其他欧洲国家首脑们担忧，一旦希腊、葡萄牙或西班牙发生违约，势必将彻底摧毁欧元的信誉。
She did it because she and other European heads of state worry that a default by Greece, Portugal, or Spain would destroy the credibility of the euro.
之所以要这样做，因为她以及其他欧洲国家首脑们担忧，一旦希腊、葡萄牙或西班牙发生违约，势必将彻底摧毁欧元的信誉。
She did it because she and other European heads of state worry that a default by Greece, Portugal, or Spain would destroy the credibility of the euro.
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