蜂蜜的粘性让它很容易粘在手指上。

The ___stickiness of honey makes it easy to get on your fingers.

这首歌的旋律太洗脑了，让人难以忘记。

The ___stickiness of this song's melody makes it hard to forget.

这款应用的粘性很高，用户平均每天使用超过两小时。

The ___stickiness of this app is impressive, with users spending over two hours daily on average.