Toss some cooked noodles with blue food coloring or cook the noodles in colored water.

把蓝色食品着色剂拌在煮好的面条里,或者在蓝色的开水里煮面条吧.

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Then push the cork into the neck of a bottle full of colored water.

然后把软木塞放进盛满有色水的瓶颈里.

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