1
thatch sth with sth
主语也常是 roof 等，实际使用中更常用被动结构，强调覆盖材料。
They thatched the cottage with straw.
他们用稻草给小屋盖了茅草顶。
浓密的头发
先理解核心含义，再看它在真实句子里的用法。
浓密的头发
thick, rough hair that resembles a thatched roof
They thatched the cottage with straw.
他们用稻草给小屋盖了茅草顶。
稻草、灯心草等,用于建造或覆盖建筑物屋顶,或覆盖干草堆、谷堆。
Straw, rushes, or similar, used for making or covering the roofs of buildings, or of stacks of hay or grain.
像茅草一样的头发
hair resembling thatched roofing material
草坪土壤中堆积的碎草、匍匐茎等物质。
A buildup of cut grass, stolons or other material on the soil in a lawn.
用作屋顶材料的植物茎秆
plant stalks used as roofing material
He ran his fingers through his thick thatch of dark hair.
他用手指拨弄了一下自己浓密的黑发。
The old man's white thatch could be seen from across the street.
老人那一头浓密的白发从街对面就能看到。
Her unruly thatch needed a good combing before the interview.
她那蓬乱的浓发在面试前需要好好梳理一下。
主语也常是 roof 等，实际使用中更常用被动结构，强调覆盖材料。
They thatched the cottage with straw.
他们用稻草给小屋盖了茅草顶。
这个短语常用来形容头发浓密厚实，带有一点蓬乱或未打理的意味。
He had a thatch of thick black hair.
他长着一头浓密的黑发。
Not this
They thatched straw on the roof.
Use this
They thatched the roof with straw.
thatch 是及物动词，宾语应是被覆盖的屋顶，材料用介词 with 引出；不能受汉语语序影响把材料直接作宾语。
Not this
The roof is thatch.
Use this
The roof is thatched.
thatch 是名词或动词，不是形容词；表示“用茅草覆盖的”应用过去分词 thatched 作表语。
Not this
He has a thatch hair.
Use this
He has a thatch of hair.
表示“浓密头发”时，thatch 是可数名词，通常用在 a thatch of hair 结构中，不能把它当作形容词直接修饰 hair。