A closed system would be, for instance, a glass of ice water with an ice cube in it, with the lid on top.
一个封闭系统可以是，比如说，一杯放了一个冰块的冰水，顶上加了盖子。
You'll need a plastic mold. You can either use a novelty ice cube tray or small ice cream molds, or you can also use used plastic jello or pudding cups.
你需要一个塑料模具，可以是一个造型新颖的冰格盘，或者小的冰淇淋模具，你还可以选用塑料果冻杯或者布丁杯。
Fill ice cube trays with lemon juice. Once frozen, store the cubes in a plastic resealable bag. This way you always have fresh lemon juice on hand.
在制冰盒中装满柠檬汁。冷冻后，把冰块储放在可再次密封的塑料袋中。这样你在手边随时都有新鲜的柠檬汁。
The National Aquatics Center, better known as the Water Cube, will be transformed into an ice arena for the 2022 Winter Olympics, Beijing Times reported on Monday.
据《新京报》本周一报道，国家游泳中心--更多地被称为“水立方”--将被改造成2022年冬奥会冰上运动场。
The ice producing duration can be adjusted intellectually according to different ambient temperature, ensuring similar ice cube size under various environments.
根据不同环境温度智能调整制冰块的时间长短，以保证在不同环境温度生产的冰块大小相近。
The ice producing duration can be adjusted intellectually according to different ambient temperature, ensuring similar ice cube size under various environments.
根据不同环境温度智能调整制冰块的时间长短，以保证在不同环境温度生产的冰块大小相近。
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