分析指出，该飑线系统是由高空槽前型的上干下湿引起的不稳定强对流天气。
The squall line is a kind of instable and strong convective weather caused by the air with upper-layer dry and lower-layer wet in front of the upper-troposphere trough.
与我交谈的农民仅十年前还在从事仅能糊口的自给型农业。
I spoke to farmers who only ten years ago barely made ends meet as subsistence farmers.
调用上述的泛型方法(通常在处理请求前调用该方法)。
Invoke the above generic method, which must always be called before processing the request.
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