通常这些行已经存在，只是将它们注释掉了。
Usually the lines are already there; they are just commented out.
注意，其中一些行可能已经存在，但是可以把它们注释掉。
Note that some of these lines may already exist, but they could be commented out.
正如您所看到的，表中不存在含有C1235的行。
如果配置文件中不存在下面这两行，请加上。
Add these two lines if they are not present in the configuration file.
根据外力的走行及力度就可以预计到某些损伤的存在。
Some injuries can be predicted based on the direction and amount of energy force.
正如我们在这个例子中看到的，您可以加载和保存在一个代码行的数据。
As we saw in this example, you can load and save data in one line of code.
这一行业目前在沙特阿拉伯还不存在。
葡萄糖是植物行光合作用的产物，存在于果汁及蜂蜜中。
The product of photosynthesis in plants, it is found in fruits and honey.
葡萄糖是植物行光合作用的产物，存在于果汁及蜂蜜中。
The product of photosynthesis in plants, it is found in fruits and honey.
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