Oxygen is essential for life.

氧气对生命至关重要。

Flashcards are essential for teaching vocabulary.

单词卡片对教授词汇至关重要。

Yeast is essential for baking bread.

酵母是烘焙面包的必需品。

Proper soil is essential for rooting.

适当的土壤对生根至关重要。

Vitamins are essential for our health.

维生素对我们的健康是必不可少的。

The reamer is essential for this task.

这项任务必不可少的是铰刀。

The vise is essential for any workshop.

台钳是任何工作坊必不可少的工具。

Accurate data is essential for research.

准确的数据对于研究至关重要。

Water is essential for all living beings.

水对所有生物都是必要的。

Iodine is essential for thyroid function.

碘对甲状腺功能至关重要。