1
the tundra
指整个苔原地区时，通常用定冠词 the。
The tundra is a harsh place.
冻原是一个严酷的地方。
苔原；冻原
先理解核心含义，再看它在真实句子里的用法。
苔原；冻原
a vast treeless plain in the Arctic regions where the subsoil is permanently frozen
The tundra is a harsh place.
冻原是一个严酷的地方。
北极地区无树的大平原,地下土壤永久冻结
a vast treeless plain in the Arctic regions where the subsoil is permanently frozen
Reindeer migrate across the tundra every spring.
每年春天，驯鹿会穿越苔原迁徙。
The tundra is covered with snow for most of the year.
苔原一年大部分时间都被积雪覆盖。
Few trees grow on the tundra because the ground stays frozen.
由于地面常年冰冻，苔原上很少有树木生长。
指整个苔原地区时，通常用定冠词 the。
The tundra is a harsh place.
冻原是一个严酷的地方。
表示“在冻原上”时，介词用 on。
Caribou live on the tundra.
驯鹿生活在冻原上。
tundra 作可数名词时，复数形式为 tundras。
Arctic tundras are wide and empty.
北极的冻原广阔而空旷。
Not this
Many tundra can be found in northern Canada.
Use this
Many tundras can be found in northern Canada.
tundra 是可数名词，复数形式为 tundras，表示多片独立苔原地区；many 后须接复数可数名词，因此不能用 tundra。
Not this
The Arctic fox lives in tundra.
Use this
The Arctic fox lives in the tundra.
tundra 是普通名词，此处特指北极苔原这一特定地区，前需加定冠词 the；中文没有冠词，学习者常漏掉，但英语中 in tundra 不合语法。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
北极苔原
The Arctic tundra is home to few trees.
北极苔原上树木稀少。
苔原植被
Tundra vegetation consists mostly of mosses and lichens.
苔原植被主要由苔藓和地衣组成。
苔原生态系统
The tundra ecosystem is highly sensitive to climate change.
苔原生态系统对气候变化高度敏感。
冰冻冻原
We hiked across the frozen tundra.
我们徒步穿越冰冻的冻原。
苔原地区
Reindeer migrate across the tundra region each year.
驯鹿每年穿越苔原地区迁徙。
苔原土壤
Tundra soil remains frozen for most of the year.
苔原土壤一年中大部分时间处于冻结状态。
Use tundra naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
tundra 开头 tu 像‘土’，想象一片冻土平原，没有树，就是苔原。
语域：neutral 常见场景：地理/环境科学、新闻报道、旅行与自然描述 这个词属于中性语体的自然地理词汇，在科学文章、新闻报道和日常描述中都比较常见。通常不需要特意区分正式或随意用法。
复数形式为 tundras。
Dictionary facts from ECDICT, WIKTIONARY.