西元2004年，張秀卿於其碩士論文中給出在三維的環面簇裡，一些特別的、其一倍後會是 very ample 的 ample divisor。根據此問題，本篇論文給出一個必要條件及一些一般結果。 In 2004,Hsiu-Ching Chang gave some special ample divisors in toric 3-folds which are very ample. Our main result is to give a necessary condition for this problem and to find a general result for this problem.
