UL stands for Underwriters' Laboratories, an American organisation that tests whether electrical products are safe — plugs, chargers, extension cords, kettles, and so on. It also tests things like fire doors and drinking water equipment, and it writes safety standards that manufacturers follow.

UL stands for代表的是 Underwriters' Laboratories, an American organisation美國機構Underwriters' Laboratories，that tests whether electrical products are safe專門檢驗電器產品安不安全，— plugs, chargers, extension cords, kettles, and so on像插頭、充電器、延長線、電熱水壺等等。It also tests它也檢驗 things like fire doors and drinking water equipment像防火門、飲用水設備這類東西，and it writes並訂定 safety standards安全標準 that manufacturers follow讓製造商遵守。

When a product passes, it may carry the UL mark, a small circle with the letters UL inside, usually stamped on the plug or moulded into the plastic. American buyers look for that mark the way people in Taiwan look for the BSMI 商檢局 mark.

When a product passes,產品通過測試時，it may carry可能會帶有 the UL markUL標章——a small circle with the letters UL inside一個裡面有UL字母的小圓圈，usually stamped on the plug or moulded into the plastic通常印在插頭上或做進塑膠裡。American buyers look for that mark美國買家找這個標章，the way people in Taiwan look for the BSMI 商檢局 mark就像台灣人找BSMI商檢局標章一樣。

Two honest cautions. UL is a private company, not a government body — it earns money from the testing it does, so its mark means "tested to a standard", not "approved by the US government". And the mark is one of the most faked marks in the world; cheap chargers online often carry a UL logo that was never earned.

Two honest cautions.老實說有兩點要提醒。UL is a private company, not a government bodyUL是一間私人公司，不是政府機構——it earns money from the testing it does,它靠做測試賺錢，so its mark means "tested to a standard",所以它的標章代表的是「通過某個標準的測試」，not "approved by the US government".不是「美國政府核准」。And the mark is one of the most faked marks in the world;而且這個標章是全世界最常被仿冒的標章之一；cheap chargers online often carry a UL logo that was never earned.網路上便宜的充電器常常掛著沒有真正拿到的UL標誌。

Say the letters one at a time: U-L.

Say the letters one at a time: U-L.字母要一個一個唸：U-L。