Smf
abbr. 系统管理程式（system management facilities）
🗣️ 情景例句
I generally go to bed at ten.
我通常十点钟睡觉。
When he opened the door the cat ran out and brushed by his legs.
当他一开门，那只猫跳了出来，偎依在他的脚边。
As it was extremely heavy, he dumped it on the counter.
布袋很沉，他重重地把布袋扔在柜台上。