折的英語翻譯：

break; convert into; discount; fold; lose money in business; ply; snap
turn over

流的英語翻譯：

flow; stream; current; stream of water; class; wandering
【計】 stream
【化】 flow coating(process); stream
【醫(yī)】 current; flow; flumen; flumina; rheo-; stream

板的英語翻譯：

bat; board; plank
【計】 board
【醫(yī)】 assula; bar; board; disc; disci; discus; disk; lamella; lamellae
lamina; laminae; plasue; plate; table; tabula; tile

弓形的英語翻譯：

arc; arch; bow-shaped; lune
【醫(yī)】 arch contour

缺口的英語翻譯：

breach; gap; indentation; jag; nick; separation
【化】 gap; nick; notch; slot
【醫(yī)】 incisio; incision