相关单词近義詞 border 邊界, outskirts 郊區, suburb 郊區, circle 圓圈, confines 疆界, constraints 強制, restraints 制約因素, boundary 邊界, bound 必定的, frontier 邊界, limit 限度臨近詞bound, bound gas, bound for, bound ray, boundable, bound back, bound acid, bound base, bound atom, bound mode, bound term 返回 bounds