日语
韩语
法语
德语
西班牙语
意大利语
阿拉伯语
葡萄牙语
越南语
俄语
芬兰语
泰语
翻译练习题
87. Medical researchers are painfully aware that there are many problems ______________ (他们至今还没有答案)
翻译成英语的定语从句，修饰前面的problems, 时态最好用现在完成时，故可翻译成：(which / that ) they have not come up with / found a solution to.
87. Medical researchers are painfully aware that there are many problems ______________ (他们至今还没有答案)
翻译成英语的定语从句，修饰前面的problems, 时态最好用现在完成时，故可翻译成：(which / that ) they have not come up with / found a solution to.
