我按文档导入lib,模拟器调试的时候，会出现：

duplicate symbol _Speech_Decode_Frame_reset in:

    /Users/happy/Desktop/工作存放区/YFStockiOS--11.19/YFStock/Vendor/VoiceConvert/opencore-amrnb/libopencore-amrnb.a(sp_dec.o)

    /Users/happy/Desktop/工作存放区/YFStockiOS--11.19/YFStock/libbdtts.a(sp_dec.o)

duplicate symbol _Decoder_Interface_init in:

    /Users/happy/Desktop/工作存放区/YFStockiOS--11.19/YFStock/libbdtts.a(interf_dec.o)

    /Users/happy/Desktop/工作存放区/YFStockiOS--11.19/YFStock/Vendor/VoiceConvert/opencore-amrnb/libopencore-amrnb.a(wrapper.o)

duplicate symbol _Decoder_Interface_exit in:

    /Users/happy/Desktop/工作存放区/YFStockiOS--11.19/YFStock/libbdtts.a(interf_dec.o)

    /Users/happy/Desktop/工作存放区/YFStockiOS--11.19/YFStock/Vendor/VoiceConvert/opencore-amrnb/libopencore-amrnb.a(wrapper.o)

duplicate symbol _Decoder_Interface_Decode in:

    /Users/happy/Desktop/工作存放区/YFStockiOS--11.19/YFStock/libbdtts.a(interf_dec.o)

    /Users/happy/Desktop/工作存放区/YFStockiOS--11.19/YFStock/Vendor/VoiceConvert/opencore-amrnb/libopencore-amrnb.a(wrapper.o)

ld: 4 duplicate symbols for architecture i386

clang: error: linker command failed with exit code 1 (use -v to see invocation)

而在真机调试的时候没问题！！这是怎么回事？