utility supply的用法和樣例：
例句
- Another threat to electricity supply comes from the power grid itself.
電力供應的另外一個威脅則來自於電網本身。 - Tea-time troubles Renewables are a problem for the grid, as currently configured, because supply has to match unfettered demand minute-by-minute.
按照現在的配置，可更新對電網來說是個麻煩，因為電力供應必須與分分秒秒無拘無束的需求相匹配。
