
tooth
词源
源自古英语 tōþ,与德语 Zahn同源,最终源自原始印欧语词根 *dent-(牙齿)。
noun
❶ 牙齿,指人或动物口腔中用于咀嚼食物的坚硬结构,通常呈白色,排列在上下颌骨上。
“She brushed her teeth before going to bed.”
(她睡前刷了牙。)
“The dentist found a cavity in my back tooth.”
(牙医发现我后牙有个蛀洞。)
❶ 齿状物,指物体边缘像牙齿一样排列的凸起部分,常见于工具或机械部件。
“The saw has very fine teeth for cutting wood smoothly.”
(这把锯子的细齿能让木材切割更顺滑。)
“Check the teeth of the gear for any damage.”
(检查齿轮的齿是否有损坏。)
verb
❶ 给某物装上齿状结构或使其具有锯齿边缘,常用于工具制造领域。
“The craftsman toothed the edge of the chisel for better grip.”
(工匠给凿子边缘开齿以增强抓握力。)
“We need to tooth this blade before it can be used.”
(我们需要给这把刀片开齿才能使用。)
常见短语
sweet tooth — 指特别喜欢吃甜食的偏好或习惯,形容人对甜味食物的强烈喜爱。
“My daughter has such a sweet tooth that she eats dessert first.”
(我女儿特别嗜甜,总是先吃甜点。)
tooth and nail — 全力以赴地斗争或争取,形容用尽一切手段激烈对抗的状态。
“They fought tooth and nail to protect their land.”
(他们竭尽全力保卫自己的土地。)