Overall, the researchers found that cutting back on liquid calories was associated with a weight loss of 0.6 pounds (0.25 kg) at 6 months and 0.5 pounds (0.24 kg) at 18 months.
Personnel must be thoroughly familiar with the properties and safety considerations before being allowed to handle a cryogenic liquid and its associated equipment.
在允许操作低温液体和它的相关设备之前，人员必须对性质和安全的考虑完全熟悉。
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Personnel must be thoroughly familiar with properties and safety considerations before being allowed to handle liquid oxygen and its associated equipment.