She seemed really relaxed, and definitely interested in me.它看起來很放松而且對我真的很有興趣

interest in:對 ... 有興趣

I have no interest in pop music.

我對流行音樂不感興趣。

I can't work up any interest in this book.

我對這本書提不起任何興趣。

just being inquisitive I think, and having a bit of fun.很好奇吧，我想，同時又玩得很開心

a bit of:一點兒的

The party was a bit of a damp squib.

這次聚會有些掃興。

I am always a bit of a duffer at maths.

我在數學方面總是有點笨。

It's not diving down for very long, maybe a couple of minutes.潛下去的時間不長，可能才兩，三分鐘

a couple of:兩個, 幾個

Give the bottle a couple of shakes before pouring the juice.

倒果汁前，先把瓶子搖幾下。

I saw a couple of men get out.

我看見有幾個人出去了。

just keeping an eye on it.就近看著它

keep an eye on:留意； 照看

Please keep an eye on the children.

請照看一下孩子們。

He asked his neighbour to keep an eye on his house.

他請鄰居照看他的房子。