bipedal
bipedal — 形容詞
1. describes the way a creature moves when it uses its two back legs for standing a
雙足行走
用兩條腿走路
describes the way a creature moves when it uses its two back legs for standing and walking, keeping the front part of its body off the ground.
Humans are bipedal, which frees their hands for using tools.
人類是雙足行走的動物，這讓雙手可以空出來使用工具。
bipedal + frees hands (advantage of trait)
The fossil showed that early humans had already developed a bipedal walking style.
那塊化石顯示，早期人類早已發展出雙足行走的移動方式。
Ostriches are bipedal birds that can run faster than most four-legged animals.
鴕鳥是雙足行走的鳥類，奔跑速度比大多數四足動物還快。
Dr. Okafor studied how bipedal movement changes the shape of human bones over time.
Okafor 博士研究雙足行走的動作如何隨著時間改變人類骨骼的形狀。
Mei-Lin designed a small bipedal robot that could walk across uneven ground.
Mei-Lin 設計了一台能在崎嶇地面行走的小型雙足機器人。
- two-legged
everyday equivalent; also describes furniture (two-legged stool), which bipedal cannot
- upright
broader meaning emphasising vertical posture rather than number of legs
- quadrupedal
walking on four legs, the opposite form of locomotion
- four-legged
everyday antonym; describes animals that use all four limbs for walking
用法筆記
The standard term in scientific and academic writing; in everyday conversation, two-legged is more common for describing animals.
常見錯誤
bipedal — 名詞
1. a creature whose natural way of moving is to stand and walk on two legs, keeping
兩足動物
靠雙腳行走的動物
a creature whose natural way of moving is to stand and walk on two legs, keeping the front part of its body off the ground.
As a biped, the kangaroo uses its strong tail to keep balance while hopping.
作為兩足動物，袋鼠利用強壯的尾巴在跳躍時保持平衡。
biped as standard noun form
Humans are not the only bipeds — birds also walk upright on two legs.
人類並非唯一的兩足動物——鳥類也用雙腳直立行走。
bipeds as plural count noun
The park ranger explained that penguins are bipeds adapted to life in cold ocean waters.
公園管理員解釋說，企鵝是適應寒冷海洋環境的兩足動物。
In biology class, the students learned that ostriches are the fastest bipeds on land.
在生物課上，學生們學到鴕鳥是陸地上最快的兩足動物。
The fossil skeleton belongs to an early biped that lived more than three million years ago.
那具化石骨骼屬於一種生活在三百多萬年前的早期兩足動物。
- biped
identical meaning; biped is the standard noun, while bipedal is the adjective form
- quadruped
a four-legged animal
用法筆記
The standard noun in both scientific and general contexts is biped (without the -al ending). Bipedal is almost exclusively an adjective; using it as a noun (e.g., "a bipedal", "bipedals") is rare and may sound unnatural to native speakers.