a moa
指个体
A moa was a large flightless bird.
一只恐鸟是一种大型不会飞的鸟。
恐鸟
Any of several large, extinct, flightless birds of the family Dinornithidae that were native to New Zealand.
Any of several species of large, extinct, flightless birds of the family Dinornithidae that were native to New Zealand; until its extinction, one species was the largest bird in the world.
The moa was a giant bird that lived in New Zealand.
恐鸟是一种生活在新西兰的巨型鸟类。
用法提示：用作单数名词，指代这种鸟本身。
Scientists study moa bones to learn about the past.
科学家研究恐鸟骨骼以了解过去。
用法提示：用作复数名词（零冠词），指代该类鸟的骨骼。
A museum exhibit features a reconstructed moa skeleton.
博物馆展出一个重建的恐鸟骨架。
用法提示：用作单数名词，前面有不定冠词。
指个体
A moa was a large flightless bird.
一只恐鸟是一种大型不会飞的鸟。
指该物种整体
The moa lived in New Zealand.
恐鸟生活在新西兰。
Many moas became extinct due to hunting.
许多恐鸟因捕猎而灭绝。
grammar · medium
易错句子There are many moa in New Zealand.
正确表达There are many moas in New Zealand.
‘moa’ 是可数名词，复数形式为 ‘moas’，不可用单数表示复数。中文学习者常受汉语无词形变化的影响而忽略复数标记。
grammar · medium
易错句子Moa is a bird native to New Zealand.
正确表达The moa is a bird native to New Zealand.
在泛指某一类动物时，英语通常需要定冠词 ‘the’ 加单数名词，而中文无冠词，导致遗漏。
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Dictionary facts from ECDICT, WIKTIONARY.