Note that the newline outside the PHP tags is output, but there is no implied newline in the echo command or the print command.
PHP 标记外的新行已被输出，但是 echo 命令或 print 命令中没有暗含的新行。
2
Simulation results implied that output dynamic response performance of secondary element improved greatly by adopting fuzzy auto-tuning PID control, the results attained expect aim .