全部

1·By comparison, the results show that using oxidized-gasified gas for cooking is of quite a few disadvantages not to be ignored such as dangers, expensiveness.

同时，还列举了作为炊事燃气供应系统应具备的特点和要求，相比较可知，氧化气化气做炊事燃气具有不安全、费用高等不容忽视的诸多弊端。

2·In the feature selection stage, the computing approximate gains in parallel is adopted in order to solve the computational expensiveness of the model and system spending.

在特征选择阶段，采用计算近似增益的平行算法，解决模型计算量过大和系统开销问题。