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The coldest that salt less ice water can get is 32 degrees Fahrenheit, where there's a balance between the rates of melting and freezing.
含有少量鹽的冰水溫度最低可達華氏32度，這一溫度是凝固和融化的平衡點。
Add salt to the mix and the energy balance tips, allowing the temperature to drop below 32 without freezing.
將鹽加到最大量能打破能量平衡，使得溫度低于32度而不結冰。
Let's say you toss a handful of salt into ice water, and the temperature drops to 20 degrees.
讓我們嘗試一下，你將少量鹽投放到冰水里，溫度降到了20度。
At this lower temperature, salty ice water can absorb more heat from the mixture inside the canister, freezing it faster than salt less ice water could.
在這種低溫里，鹽水能從金屬罐里的混合物中吸收更多的熱量，與淡冰水相比能盡快將其凍結。
This means you can quit cranking sooner, kick back on the porch and enjoy some good-old-fashioned ice cream.
這意味著你能快速停止搖動，返回走廊，享受美味的老式冰淇淋了。
譯文為可可英語翻譯，未經授權請勿轉載!
