主段的中心结构是轴丝。

The central structure of the principal piece is axoneme.

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三个主要的建筑上的轴丝构成的核心，天坛。

The three major constructions on the axle wire constitute the core of the Temple of Heaven.

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一个早期基体—轴丝复合体的轴丝是由具有内、外动力蛋白臂的9个双微管组成，缺少中央微管。

The early axoneme of a basal body-axoneme complex consists nine doublets with only inner and outer dynein arms, no central microtubules.

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一个早期基体—轴丝复合体的轴丝是由具有内、外动力蛋白臂的9个双微管组成，缺少中央微管。

The early axoneme of a basal body-axoneme complex consists nine doublets with only inner and outer dynein arms, no central microtubules.

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