The hypothesis is coherent, if speculative, and I cannot conclusively rule it out. 如果冒險一些說，這個假說是自洽的，并且我不能確定地排除其可能性。
Since injection density cannot be varied independently, it is difficult to show conclusively its effect on combustion stability. 由于不可能獨立地改變噴射密度，要確定地指出噴射密度對燃燒穩定性的影響是很困難的。