specimen|specimens

这个昆虫标本对于分类学研究至关重要。

This insect ___specimen is crucial for taxonomic studies.

许多稀有标本因人类活动而丢失。

Many rare ___specimens were lost due to human activity.

博物馆为其收藏获得了一个新标本。

The museum acquired a new ___specimen for its collection.