The little word up is the whole picture. Think of filled up, topped up, warmed up: up means poured in until it reaches the brim. Someone who is loved-up is not just in love, they are full of it, and it is running over the edge into how they look — the smiling, the photos, the arm that will not come off a shoulder. The two uses differ only in where all that overflow is pointed: at one person, or at a whole room of strangers.
可以想成整個畫面就藏在後面那個 up 裡。像 filled up、topped up、warmed up 那樣，up 表示一直加、加到滿出來。所以 loved-up 的人不只是戀愛中，而是被愛裝滿了，滿到從表情、照片、那隻捨不得放下的手上溢出來。兩個意思的差別只在這些滿出來的東西流向哪裡：流向一個人，或是流向整個場子裡的陌生人。
登入就可以看每一支怎麼連回核心畫面。