Sfy
abbr. standard facility years(s) 标准设备寿命
🗣️ 情景例句
I'm sure everyone will be very happy with these gifts.
相信他们一定会喜欢这些礼物的。
Did you go to the store yesterday?
你昨天去商店了吗？
because this is easier to shape than other kinds.
因为燧石较之其他石头更容易成形。