英语语法分析

A system of metastable helium atom beam source has been developed.

研究设计了一种亚稳态氦原子束源系统。

The metastable propagation rate of crack is approximately a constant in a certain size range.

在一定尺寸范围内，裂纹的亚稳扩展速率近似是常数。

In order for the preflare energy to be stored without premature release, the magnetic field configuration must be metastable .

为了使能量在耀斑爆发前储存起来，不致过早释放，磁场结构必须是亚稳定的。