1
[place] is covered with bracken
bracken 通常作不可数名词，不用 a/an。
The hillside is covered with bracken.
山坡上长满了欧洲蕨。
蕨
先理解核心含义，再看它在真实句子里的用法。
蕨
a fern of southeastern Asia; not hardy in cold temperate regions
The hillside is covered with bracken.
山坡上长满了欧洲蕨。
蕨属(Pteridium)的几种粗壮蕨类植物,形成茂密灌丛；常对牲畜有毒。
Any of several coarse ferns, of the genus Pteridium, that form dense thickets; often poisonous to livestock.
东南亚的蕨类植物；在寒冷温带地区不耐寒
fern of southeastern Asia; not hardy in cold temperate regions
大量生长这种蕨类的乡村地区。
An area of countryside heavily populated by this fern.
大型粗糙的蕨类植物,通常高达几英尺；本质上是杂草蕨类；分布广泛
large coarse fern often several feet high; essentially weed ferns; cosmopolitan
We followed a narrow path through the tall bracken behind the village.
我们沿着村后一条狭窄的小路穿过高高的欧洲蕨丛。
The dog disappeared into the bracken and came back a minute later.
狗钻进欧洲蕨丛里，一分钟后回来了。
In autumn the bracken turns golden brown before dying back.
秋天，欧洲蕨会变成金棕色，然后枯萎。
bracken 通常作不可数名词，不用 a/an。
The hillside is covered with bracken.
山坡上长满了欧洲蕨。
a patch of 表示“一片、一丛”，用于描述成片的蕨类。
We walked through a patch of bracken.
我们穿过了一片欧洲蕨丛。
作主语时动词用单数形式 grows。
Bracken grows well on acidic soil.
欧洲蕨在酸性土壤上长得好。
Not this
The hillside was covered of bracken.
Use this
The hillside was covered with bracken.
表示“被某物覆盖”时,英语搭配是 be covered with/in + 覆盖物,不用介词 of。“covered of”是受中文“覆盖的”影响产生的错误搭配;将 of 改成 with 后,句子才符合英语习惯。
Not this
Bracken are growing all over the field.
Use this
Bracken is growing all over the field.
bracken 通常作不可数名词,指成片生长的蕨类植物,谓语动词用单数 is。学习者常因觉得“很多”而误用复数 are;改成 is 后主谓一致,意思不变。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
茂密的欧洲蕨
The path was hidden by dense bracken.
小路被茂密的欧洲蕨遮住了。
长满欧洲蕨的山坡
We climbed a bracken-covered hillside.
我们爬上一座长满欧洲蕨的山坡。
一片欧洲蕨
A patch of bracken grew beside the stream.
溪边长着一片欧洲蕨。
欧洲蕨（一种蕨类植物）
Bracken fern spreads quickly in dry soil.
欧洲蕨在干燥的土壤中蔓延得很快。
欧洲蕨的防治
Farmers carry out bracken control to improve grazing land.
农民防治欧洲蕨以改善牧场。
Use bracken naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
bracken：把 k 想成蕨叶的分叉，两侧字母像展开的羽片；欧洲蕨就是羽状复叶的大蕨。
语域：neutral 常见场景：植物学资料、自然观察记录、生态或植被讨论 该词通常用于植物学或自然描写等中性语境，正式和非正式场合都可接受；多指欧洲蕨这种植物。
与 bracken /ˈbrækən/ 真正押韵的是 blacken /ˈblækən/ 和 slacken /ˈslækən/（重读元音及后面部分相同）。thicken、chicken 虽也以 -cken 结尾，但重读元音不同，不押韵；bacon /ˈbeɪkən/、beacon /ˈbiːkən/ 是容易看错的形近词，读音差异明显。
Dictionary facts from ECDICT, WIKTIONARY.