planarian
planarian — 名詞
1. a small flatworm that belongs to the order Tricladida, having a body with three
真渦蟲
三腸目渦蟲的分類名稱
a small flatworm that belongs to the order Tricladida, having a body with three branches in its digestive system and living mainly in freshwater places such as lakes and streams.
Under the microscope, the planarian's three-branched gut showed it belonged to the Tricladida group.
在顯微鏡下，這隻真渦蟲的三叉腸道顯示牠屬於三腸目。
classification: belongs to Tricladida order
Dr. Okafor classified the freshwater flatworm as a planarian after studying its body structure.
Okafor 博士在研究了其身體結構後，將這隻淡水扁蟲歸類為真渦蟲。
Planarians of the Tricladida order are found in lakes, rivers, and slow-moving streams worldwide.
三腸目的真渦蟲遍布世界各地的湖泊、河流和緩慢流動的溪流中。
In zoology class, the students learned to identify a planarian by its flat body and simple eyespots.
在動物學課堂上，學生們學會透過扁平的身體和簡單的眼點來辨識真渦蟲。
The planarian's soft body and ciliated surface help it glide smoothly through the water.
真渦蟲柔軟的身體和纖毛表面幫助牠在水中順暢地滑行。
- triclad
a more technical term that refers specifically to members of the order Tricladida
- turbellarian
a broader category of free-living flatworms that includes planarians
文法句型
a planarian
the family of planarians
用法筆記
Frequently appears in biology textbooks and zoology lessons when discussing flatworm classification. The term triclad is sometimes used as a shorter name for planarians belonging to this order.
常見錯誤
2. a small freshwater flatworm that scientists often use in laboratory experiments
渦蟲
常用於再生實驗的淡水扁蟲
a small freshwater flatworm that scientists often use in laboratory experiments because it can regrow parts of its body that have been cut off or damaged.
The lab researchers cut a planarian into three pieces and watched each piece grow into a new worm.
實驗室研究人員將一隻渦蟲切成三段，觀察每一段都長成一條新的蟲。
demonstrates regeneration ability
Mei-Lin placed a planarian under the microscope to observe how its tail section began to regenerate.
Mei-Lin 將一隻渦蟲放在顯微鏡下，觀察其尾部如何開始再生。
Scientists study planarians because these tiny flatworms can regrow a complete head in about one week.
科學家研究渦蟲，因為這些微小的扁蟲能在約一週內重新長出完整的頭部。
Each planarian in the experiment was kept in a shallow dish of cool, clean pond water.
實驗中的每隻渦蟲都養在裝有涼爽清潔池水的淺盤中。
The biology class observed planarian regeneration by cutting one worm and recording the new growth every day.
生物課透過切開一隻渦蟲並每天記錄新生長情況，來觀察渦蟲的再生現象。
- flatworm
a broader term for any worm with a flat body, not just the regenerating type
- turbellarian
a scientific term for free-living flatworms that includes planarians
文法句型
a planarian
planarians (plural)
用法筆記
Most often found in school and university lab reports about regeneration and stem cell research. Unlike sense 1, which focuses on taxonomic classification, this sense describes the organism's practical use as a research model.