being the only existing one of its type or, more generally, unusual, or special in some way

Each person's genetic code is unique except in the case of identical twins. 每个人的遗传密码都是独一无二的，同卵双胞胎除外。

I'd recognize your handwriting anywhere - it's unique. 无论在哪儿，我都能认出你的笔迹——它太与众不同了。

Do not miss this unique opportunity to buy all six pans at half the recommended price. 购买全部6只平底锅只需半价——不要错过这难得的机会。

As many as 100 species of fish, some unique to (= only found in) these waters, may have been affected by the pollution. 有多达100种鱼类可能已经受到污染，其中有些是这里特有的。

Synonyms: unequalled unparalleled