"Sun" . "孙永华, (植物学 )" . "(植物学 ) 孙永华" . . . "孙永华" . "孫永華" . "Sun, Yonghua, (zhi wu xue )" . . "Yonghua Sun"@en-CA . "(zhi wu xue ) Yonghua Sun" . "孫永華" . "Yonghua" . "孙永华" . . .