How many standard drinks can you have before driving if you are under 20 years old?

如果你不足20週歲，你可以喝多少個標準量的酒精飲品並駕駛車輛？

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One drink is not automatically safe or legal. Even small amounts of alcohol can impair driving.

不能按“喝一杯沒關係”判斷可否駕駛；即使少量酒精也可能影響駕駛能力。