Hfo
abbr. heavy fuel oil 重（燃）油; high-frequency oscillator 高频振荡器
🗣️ 情景例句
She is not able to take your call at the moment.
她现在没办法接你的电话。
Could you tell me where the nearest telephone is?
你能告诉我最近的电话在哪儿吗？
It is animals and plants which lived in or near water whose remains are most likely to be preserved,
只有生活在水中或水边的动植物尸体最有可能被保存下来，