1
a + rusk
rusk 是可数名词，单数前用 a。
The baby is eating a rusk.
宝宝正在吃一块面包干。
面包干
rusks — plural of rusk
先理解核心含义，再看它在真实句子里的用法。
面包干
a slice of sweet leavened bread baked again until it is brown, hard, and crisp
The baby is eating a rusk.
宝宝正在吃一块面包干。
长方形的干燥硬饼干。
A rectangular, hard, dry biscuit.
再烤面包,切片烘至硬脆；烤面包片。
A twice-baked bread, slices of bread baked until they are hard and crisp; zwieback.
儿童断奶食品。
A weaning food for children.
用于肉制品生产的谷物粘合剂。
A cereal binder used in meat product manufacture.
She dipped the rusk into her tea until it softened.
她把面包干蘸进茶里，直到它变软。
The baby chewed on a rusk while sitting in the high chair.
宝宝坐在高脚椅上嚼着一块面包干。
These rusks are made from sweet bread that is baked twice.
这些面包干是用甜面包经过两次烘烤制成的。
rusk 是可数名词，单数前用 a。
The baby is eating a rusk.
宝宝正在吃一块面包干。
复数形式是 rusks；some 用于不确定的数量。
I bought some rusks for breakfast.
我买了一些面包干当早餐。
Not this
I ate rusk for breakfast.
Use this
I ate a rusk for breakfast.
rusk 是可数名词，单数形式前必须有冠词或限定词，不能说 I ate rusk；加 a 表示一块面包干。
Not this
You make rusk by toasting the bread twice.
Use this
You make rusk by baking the bread twice.
rusk 指面包切片再次烘烤至干硬脆，动词应用 bake（烘烤），而 toast 指把已烤好的面包片烤热烤黄，二者含义不同，不能混用。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
磨牙饼干
The baby chewed on a teething rusk to soothe her gums.
宝宝啃着磨牙饼干来缓解牙龈不适。
甜面包干
She spread butter on a sweet rusk for breakfast.
她早餐在甜面包干上抹了黄油。
松脆的面包干
The crisp rusk snapped easily in his hand.
松脆的面包干在他手里轻轻一掰就断了。
把面包干在咖啡里蘸一下
He likes to dunk a rusk in his coffee.
他喜欢把面包干在咖啡里蘸一下。
面包干屑
Use rusk crumbs to coat the fish before frying.
煎鱼前用面包干屑裹住鱼身。
烤面包干
We baked a batch of rusks on Sunday.
我们周日烤了一批面包干。
Use rusks naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
联想 tusk（獠牙）：rusk 只把 t 换成 r，同样硬邦邦——烤两次的面包干。
语域：neutral 常见场景：bakery、recipes、packaged foods 该词是普通名词，指烤得干硬的面包片，通常在烘焙、日常饮食和商品描述等场景中使用，语域中性，多用于日常语境。
这些词都与 rusk /rʌsk/ 押韵，重读元音都是 /ʌ/，后面都读 /sk/。注意 lookalikes 如 rush /rʌʃ/ 和 risk /rɪsk/ 发音不同，并不押韵。
Dictionary facts from ECDICT, WIKTIONARY.