短語(yǔ)詞組短語(yǔ)beginning leading mark 首尾導(dǎo)標(biāo)beginning g mark 起始標(biāo)記tape beginning mark 帶始標(biāo)mark the beginning of 標(biāo)記的開(kāi)端beginning -of-tape mark 帶首號(hào) 返回 beginning mark