目前大质量恒星形成的理论主要有两种，即吸积说和并合说。
There are two main theories concerning massive star formation, accretion and merger.
用这方法简化难题，天文物理学家就能够建立吸积盘的理论模型，以便与实际圆盘的观测比较。
By cutting the Gordian knot in this way, astrophysicists have been able to build theoretical models of accretion disks to compare with observations of actual disks.
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