不幸的是，大鼻子是家族特征。

Unfortunately a big nose is a family ___characteristic.

感伤似乎是那个时期所有作家的一个特征。

Sentimentality seems a ___characteristic of all the writers of that period.

雄鸟展示了几种区别于雌鸟的特征。

The male bird displays several ___characteristics which distinguish him from the female.