你是我生命中必不可缺的一部分。

You are a part of me, a part that I could never live without.

空气、食物和水是维持生命必不可缺的。

Air, food and water are necessary to support life.

视镜是必不可缺的，可是它们妨碍了视线。

Glasses are, of course, an indispensable thing, but they worsen the sight.

帽子也很时尚，也是必不可缺的，因为要员受阳光的伤害。

Hats are also very fashionable and necessary too, for protection from the sun.

华纳兄弟公司产品部英国总经理Paul Bufton表示：“时尚元素是《绯闻女孩》的本质精华，同时也是剧集保持超高人气必不可缺的元素。”

Warner Bros Consumer Products U.K. general manager Paul Bufton says, "Fashion is intrinsic to Gossip Girl and a key ingredient in the continued popularity of the series."