egg yolk colour 蛋黄色泽
Eggshell thickness, strength and yolk colour of dwarf layers were significantly better than those of normal layers.
矮小型鸡的蛋壳厚度、强度和蛋黄颜色均优于普通型蛋鸡。
The egg yolk is of a much brighter colour (between 0.2 and 1 point on the Roche scale).
蛋黄颜色也更深(介于罗氏比色扇的0.2至1点之间)。
Soften butter under room temperature. Stir butter to cream shape in a mixing bowl. Add sugar, whisk until mixture changes to lighter colour. Stir in beaten egg yolk. Mix well.
牛油于室温放至软化，放进不锈钢盆内，用木匙压至油状，加入砂糖，以达蛋器打至奶白色，加入打散的蛋黄搅匀。
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