通过这种试探法，可以尽快（尽可能接近表访问）地在查询中应用谓词。
With this heuristic, predicates are applied as soon as possible (as close to table access as possible) in the query.
比如挖掘周边的资源，问问你身边的人，更新你的简历，投简历，递交申请表，发一些试探性的邮件。
Look around for openings, call people, update your resume and submit it to a few places, pick up a few applications, send out some email feelers.
把测试探针连接到插头1和2，并记下欧姆表读数。
Attach test leads to pins 1 and 2 and note ohmmeter reading.
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