首先建立入水前后两个衔接阶段的较为严密的场方程。

We first establish the rigorous field equations of the two continuous stages before and after entering water.

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七年级是中小学的衔接阶段，英语教材起着承上启下的作用。

Grade Seven is the transition between the primary school and junior middle school; and English textbooks play the role of connecting.

youdao

事实上，我们就是那丢失的进化衔接部分，在你们从原人直接跳跃进化智人阶段。

We are in fact the missing link that has jumped your evolution from what you call primitive man.

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