Qf
abbr. 速射的（Quick-Firing）
🗣️ 情景例句
I could tell something was up by the look on their faces.
我一看他们的脸色就知道有事。
Where the knot is loose the string slips.
结子一松掉，绳子就滑脱。
So it is a comparatively simple step from locating the sea bottom to locating a shoal of fish.
从测定海深到测定鱼群，这一进展比较容易。