During the planning phase, I let them climb a ladder to the mark on the trunk where the floor would go.
在整个规划设计阶段，我让他们爬上梯子在树干上标记下将要架设树屋地板的地方。
Molecular outflows mark an important phase in the early evolution of star formation.
分子外流标志着恒星形成早期演化的一个重要阶段。
Migration phase state is the main mark of the character of migration.
运移相态是运移特征的主要标志。
Migration phase state is the main mark of the character of migration.
运移相态是运移特征的主要标志。
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