The most potent greenhouse gas is HFC-23, a by-product of HCFC-22, a chemical used in, among other things, fridges.
温室效应最强的其他十三氟甲烷(HFC - 23)，是用于冰箱制冷的化学物质HCFC - 22的副产品。
The condensing unit can be shipped dry and then charged with refrigerant on-site, which "allows the continued widespread use of HCFC-22."
压缩机部件可以不加制冷剂就出货，然后到达目的地再加注制冷剂，这就“无形中允许了HCFC - 22的继续使用和传播。”
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