Conclusions Echocardiography was the first choice to diagnose persistent truncus arteriosus in clinical imaging diagnostic methods.
结论超声心动图可作为影像诊断永存动脉干的首选与筛选方法。
He said a last choice would be chemical control. But he suggests using management methods first.
病虫害防治最后的办法才是化学控制，首先应该使用综合防治办法。
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