台Taivo A Taiwan Mandarin dictionary

在那兒

zàinar

ㄗㄞˋ ˙ㄋㄚ ˙ㄦ

Simplified 在那儿

1(adverbial expression indicating that the attention of the subject of the verb is focused on what they are doing, not distracted by anything else)
2just ...ing (and nothing else)

Example

筆在那兒。

bǐ zàinar

There is a pen.

Keep 在那兒 and it comes back until you know it.