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A burro is carrying salt of one large bag backcross a river.有一头驴子驮着一大袋子盐过河.The method can be conveniently applied to practical backcross breeding programs.该方法可以很方便地应用于实际的回交育种....
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backcross的复数形式为：backcrosses...
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backcross的一般过去时为：backcrossed...
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backcross的音标：backcross的英式发音音标为：[bækk'rɒs]backcross的美式发音音标为：[bækk'rɒs]...
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backcross的第三人称单数（三单）为：backcrosses...
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backcross的现在进行时为：backcrossing...
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backcross的现在完成时为：backcrossed...