If the first layer isn't dry before you add the next one, the colours will run into each other (= mix). 如果第一层没有干就涂上第二层，那两层的颜色就会渗在一起。

Play Run now at Coolmath Games. This game requires a huge amount of concentration and memorization as you progress through the 3D levels.

Run是英语中兼具名词与动词词性的多义词，读音为 [rʌn]。 作名词时指“奔跑、赛跑、趋向”，作动词时含义涵盖“管理、运行、参赛”等，其过去式为ran，过去分词与原形相同。

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When you run, you move more quickly than when you walk, for example because you are in a hurry to get somewhere, or for exercise. [...] 2. When someone runs in a race, they run in competition with …

Collins Chinese Dictionary Plus (3rd edition), 2011: run [rʌn] pt (pp ran) run I n [c] 1 (as exercise, sport) 跑步 pǎobù [次 cì] 2 (in car) 旅行 lǚxíng

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The meaning of RUN is to go faster than a walk; specifically : to go steadily by springing steps so that both feet leave the ground for an instant in each step.

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