a/an + turtle
turtle 是可数名词，单数形式前必须加冠词。
A turtle was slowly crossing the road.
一只乌龟正在慢慢地过马路。
高领毛衣；高领衫；龟形巧克力糖；山核桃焦糖巧克力糖；（编程教学中的）海龟；绘图机器人；绘图光标；（霹雳舞）乌龟旋转；（冒泡排序）尾部的慢速元素；龟项
a reptile that lives in or near water or on land, with a hard shell on its back
一种机器人,外壳呈圆顶状(因此类似于爬行动物),用于教育,特别是通过计算机程序绘制线条图
A type of robot having a domed case (and so resembling the reptile), used in education, especially for making line drawings by means of a computer program.
古老而可敬的乌龟会成员,一个饮酒俱乐部。
A member of the Ancient and Honorable Order of Turtles, a drinking club.
高领紧身毛衣
a sweater or jersey with a high close-fitting collar
屏幕上的光标,功能与绘图用的机器人相同
An on-screen cursor that serves the same function as a turtle for drawing.
龟,有壳和鳍状肢的爬行动物
any of various aquatic and land reptiles having a bony shell and flipper-like limbs for swimming
在冒泡排序中接近列表末尾的小元素,因此需要较长时间才能交换到正确位置。与兔子比较
A small element towards the end of a list of items to be bubble sorted, and thus tending to take a long time to be swapped into its correct position. Compare rabbit.
一种霹雳舞动作,舞者的重量从一只手转移到另一只手,产生旋转或圆形“行走”
A breakdancing move consisting of a float during which the dancer's weight shifts from one hand to the other, producing rotation or a circular "walk".
用于放置灯等的低架
A low stand for a lamp etc.
一种糖果,含有山核桃、焦糖和巧克力,通常形状像乌龟
A candy with pecans, caramel, and chocolate, often shaped like a turtle.
The turtle slowly crossed the road after the rain.
雨后，那只乌龟慢慢地穿过了马路。
用法提示：turtle 作名词，指乌龟这种爬行动物。
We saw a green turtle swimming near the coral reef.
我们在珊瑚礁附近看到一只绿海龟在游动。
用法提示：turtle 作名词，这里指海龟，前面用 a green 修饰。
My little brother asked if he could keep a turtle as a pet.
我弟弟问他能不能养一只乌龟当宠物。
用法提示：turtle 作名词，指作为宠物的乌龟，在句中作 keep 的宾语。
turtle 是可数名词，单数形式前必须加冠词。
A turtle was slowly crossing the road.
一只乌龟正在慢慢地过马路。
复数形式常用来泛指龟这类动物。
Turtles lay their eggs on sandy beaches.
海龟在沙滩上产卵。
表示所属关系时用 's 所有格。
The turtle's shell protects it from danger.
乌龟的壳保护它免受危险。
grammar · medium
易错句子There are many turtle in the sea.
正确表达There are many turtles in the sea.
turtle 是可数名词，泛指多条龟时要用复数形式 turtles。汉语名词没有单复数变化，学习者容易漏掉词尾 -s；而 many 只能修饰可数名词复数，所以这里必须加 -s。
grammar · medium
易错句子Turtle is a slow animal.
正确表达A turtle is a slow animal.
英语可数名词单数不能裸用，前面必须有限定词。此处泛指一整类动物，用 a turtle 或复数 turtles（Turtles are slow animals.）都可以。汉语习惯说“龟是……”，名词前不加冠词，这是典型的母语迁移错误。
海龟
We saw a sea turtle swimming near the reef.
我们看到一只海龟在礁石附近游动。
龟壳
The turtle shell protects the animal from predators.
龟壳保护这种动物免受捕食者伤害。
宠物龟
She keeps a pet turtle in a tank by the window.
她在窗边的鱼缸里养了一只宠物龟。
箱龟
A box turtle can pull its head and legs completely inside its shell.
箱龟能把头和腿完全缩进壳里。
鳄龟
A snapping turtle can bite hard if you disturb it.
如果你惊扰鳄龟，它可能会狠狠咬人。
龟蛋
Turtle eggs are buried in the sand until they hatch.
龟蛋埋在沙子里，直到孵化。
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