空洞和间隙环的形成，是辐照过程中材料微观结构演变的基本问题。

The development of voids and interstitial loops are the basic aspects of the microstructure changes of the material under irradiation.

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详细设计了DCRTP组播树的形成、维护和优化，设计了DCRTP控制环的形成和恢复。

The formation, maintenance and optimization of DCRTP's multicast tree and the formation, recovery of DCRTP's control ring are designed in detail.

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大量的抛射物撞击更大的天体，形成各种各样的陨石坑，包括“多环盆地”——在行星和卫星上观察到的最大的地质特征。

Massive projectiles striking much larger bodies create various kinds of craters, including "multi-ring basins"—the largest geologic features observed on planets and moons.

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They want to get as far away from each other possible, the ideal angle is 120. But what we have here is a four-membered ring, so what angle does 90° that have to be, that bond? 90 degrees.

它们想要尽量远离彼此，最理想的是形成120°键角,但现在是个四元环,所以这键角应该多大？

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