短語詞組短語dead -ball line 端線a dead tennis ball 失去彈性的網(wǎng)球dead ball period 死球期間D dead ball 死球dead center of ball 球中心點(diǎn)Dead ball line 死球線;該區(qū)底線為死球線Dead Ball Era 死球時(shí)代;死球年代 返回 dead ball