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a mulberry
mulberry 是可数名词，单数前加 a/an。
She picked a mulberry from the branch.
她从树枝上摘下一颗桑葚。
桑树
先理解核心含义，再看它在真实句子里的用法。
桑树
a tree of the genus Morus that bears edible fruit resembling blackberries
She picked a mulberry from the branch.
她从树枝上摘下一颗桑葚。
Any of several trees, of the genus Morus, having edible fruits.
The fruit of this tree.
A dark purple colour tinted with red.
The mulberry in our backyard grew tall enough to shade the whole patio.
我们后院的桑树长得够高了，能给整个露台遮阴。
We collected ripe mulberries from the basket and baked them into a pie.
我们从篮子里挑出成熟的桑葚，烤成了一个派。
She chose a deep mulberry for the hallway walls to create a warm atmosphere.
她为走廊的墙壁选了深紫红色，以营造温馨的氛围。
mulberry 是可数名词，单数前加 a/an。
She picked a mulberry from the branch.
她从树枝上摘下一颗桑葚。
复数形式 mulberries 表示多颗桑葚。
The mulberries are ripe enough to eat.
这些桑葚已经熟透了，可以吃了。
mulberry 可直接修饰 tree 构成复合名词，表示桑树。
There is an old mulberry tree behind the house.
房子后面有一棵老桑树。
mulberry 作定语时表示“桑”或“桑蚕”相关的，如 mulberry silk 指桑蚕丝。
Mulberry silk is softer than ordinary silk.
桑蚕丝比普通丝绸更柔软。
Not this
I like eating mulberry very much.
Use this
I like eating mulberries very much.
mulberry 表示“桑葚”这种水果时是可数名词；泛指这类水果应用复数形式 mulberries，不能照搬汉语“桑葚”的单数形式。
Not this
She wore a mulberry color dress.
Use this
She wore a mulberry-colored dress.
表示“桑葚色的”时，英语要用复合形容词 mulberry-colored，由名词 mulberry 加 -colored 构成；不能说成 mulberry color dress，因为“颜色”这个义项不能被当作形容词直接修饰名词。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
桑树
The mulberry tree in our garden is very old.
我们花园里的桑树很老了。
桑叶
Silkworms feed on mulberry leaves.
蚕吃桑叶。
桑葚
The mulberry fruit turns dark purple when it ripens.
桑葚成熟时会变成深紫色。
黑桑
Black mulberry has a sweeter flavor than most other varieties.
黑桑比其他多数品种更甜。
桑树丛
The children played a game around the mulberry bush.
孩子们围着桑树丛做游戏。
白桑
White mulberry is often grown in Asia for raising silkworms.
白桑通常在亚洲种植用于养蚕。
拐弯抹角；绕圈子不直说
Don't go round the mulberry bush; just tell me the answer.
别拐弯抹角了，直接告诉我答案吧。
（又）绕来绕去；老调重弹
It's the same argument again — here we go round the mulberry bush.
又是同一场争论——绕来绕去还是老样子。
我们绕着桑树丛走，桑树丛，桑树丛。我们绕着桑树丛走，在这寒冷有霜的早晨。
On a cold and frosty morning, the children played the game "Here we go round the mulberry bush."
在一个寒冷有霜的早晨，孩子们玩了“我们绕着桑树丛走”的游戏。
你们若有信心像一粒芥菜种，就是对这棵桑树说：‘你要拔起根来，栽在海里’，它也必听从你们。
In Luke 17:6, Jesus uses a mulberry tree to teach that even a tiny faith can accomplish great things.
在路加福音17:6，耶稣用一棵桑树来教导：即使只有一点点信心，也能成就大事。
Use mulberry naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
把 mulberry 拆成 mull + berry：反复琢磨(mull)这颗桑葚浆果(berry)的酸甜味，就记住了。
语域：neutral 常见场景：日常对话、园艺与植物介绍、饮食与颜色描述 该词通常为中性，日常口语和书面语都较常见；具体指桑树、桑葚还是深紫红色，需由上下文判断。
没有常用词与 mulberry /ˈmʌlbəri/ 真正押韵。下面这些词都以 -berry 结尾，拼写上很像，且词尾读音相近；但它们的重读元音不同，所以都不是押韵词，只能作为拼写参考。
Dictionary facts from ECDICT, WIKTIONARY.