If the superposition cuts is symmetrical, the labeling can be omitted. Otherwise, it must be labeled with a cutting symbol with arrows, but the letters may be omitted.是什么意思_If the superposition cuts is symmetrical, the labeling can be omitted. Otherwise, it must be labeled with a cutting symbol with arrows, but the letters may be omitted.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句