Colour idioms: blue 颜色成语：蓝色
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In this episode, The Teacher introduces you to three idiomatic phrases connected with the colour blue.
1. A bolt from the blue
2. Once in a blue moon
3. Until you are blue in the face
In this episode, The Teacher introduces you to three idiomatic phrases connected with the colour blue.
1. A bolt from the blue
2. Once in a blue moon
3. Until you are blue in the face
