问题的症结有二，其中次要原因是资金不足。
These problems have two causes, the smaller of which is lack of money.
当然，次要原因的根源还在于钢水气体含量高导致铸坯存在皮下气泡。
Of course, more gas content in molten steel causes that steel billets come into being the subcutaneous bubble is also important reason.
管子内压应力与管系应力加速了爆漏过程，是造成过热器管撕裂爆口的次要原因。
The inner stresses of the tubes and pipe arrangement stresses are the secondary cause, which accelerated the explosion procedure.
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