He altered his face all at once.
他突然变了脸。
He altered his face all at once.
他突然变了脸。
All at once it began to rain.
突然间下起雨
。
Add buttermilk all at once and mix just to combine. Do not overmix, or the scones will be tough.
倒入白脱牛奶，拌匀即可，不要过度搅拌，否则会令司康
饼变硬。
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