要获得签证，申请人必须已由在移民局注册的雇主提供担保。
To obtain the visa, the applicant had to have been sponsored by an employer registered with the immigration bureau.
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had英 /hæd/|美 /hæd/
to英 /tuː/|美 /tu/|英 /tə/|美 /tə/
been英 /biːn/|美 /bɪn/
sponsored英 /ˈspɒnsəd/|美 /ˈspɑnsərd/
解释
"had to" 为过去式义务，"have been sponsored" 为完成式被动态不定式，表示担保程序在签证申请日必须是已完成状态。
To obtain the visa, the applicant had to have been sponsored by an employer registered with the immigration bureau.
"had to" 为过去式义务，"have been sponsored" 为完成式被动态不定式，表示担保程序在签证申请日必须是已完成状态。