?alevin是一個英語單詞，意思是指剛孵化出來的魚類幼蟲。它的發音為[lvn]，重音在第二個音節。

用法：

alevin通常用作名詞，單數形式為alevin，復數形式為alevins。它主要用于描述剛孵化出來的魚類幼蟲，特別是鮭魚、鱒魚和大型淡水魚類的幼體。它可以用來指代任何剛孵化出來的魚類幼蟲，但通常更多地用于指代具有特定生長階段和特征的幼體。

例句1-5句且中英對照：

1. The alevin were carefully transferred to the hatchery tanks for further growth.

這些alevin被小心地轉移到孵化池中繼續生長。

2. The alevin stage is a critical period for the survival of young fish.

alevin階段對于幼小魚類的存活至關重要。

3. The alevin were observed to have a yolk sac attached to their bodies.

觀察這些alevin身上附著著卵黃囊。

4. Alevin are highly vulnerable to predators during this early stage of development.

在發育早期，alevin極易受到捕食者的攻擊。

5. The alevin will eventually develop into fry and then become adult fish.

alevin最終會發育成小魚，然后成為成年魚。

同義詞及用法：

1. Fry：指剛孵化出來的魚類幼蟲，與alevin意思相近，但通常更多用于指代具有特定生長階段和特征的幼體。

例句：The hatchery was filled with hundreds of fry, swimming around in the tanks.

2. Fingerling：指年齡較小的魚類，通常用于描述從alevin階段發育到幼體階段的過程。

例句：The fingerlings were released into the river to repopulate the dwindling fish population.

3. Juvenile：指年輕的、未成熟的動物，可以用來描述從alevin階段發育到成年階段的過程。

例句：The juvenile salmon were observed migrating downstream towards the ocean.

4. Larva：指任何昆蟲或節肢動物在蛹變前的幼蟲狀態，也可以用來形容剛孵化出來的魚類幼蟲。

例句：The larva of the dragonfly emerged from its egg and crawled towards the water.

5. Smolt：指一種特定生長階段的鮭魚和大型淡水魚類，在此之前是alevin，在此之后是adult fish。

例句：The smolts were released into the river in hopes of replenishing the salmon population.