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What is the safest interpretation of the red areas around the truck in this diagram?
對圖中卡車周圍紅色區域，怎樣理解最有助於安全？
The red areas illustrate possible blind spots around the truck; avoid staying there.
它們示意卡車前、後及兩側可能存在盲區，應避免停留其中。
閱讀相關知識
Their exact extent varies with vehicle, mirrors and conditions. Seeing the truck does not prove its driver sees you. Keep clear, particularly of its left-side blind area.
這是一幅示意圖，不能保證所有車型、後視鏡設置和現場條件下的盲區範圍完全相同。不要認為能看見卡車就代表司機一定能看見你；應保持距離，尤其避免在左側盲區並行。