backcross的现在完成时怎么写

backcross的第三人称单数（三单）为：backcrosses...

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....

backcross的一般过去时为：backcrossed...

backcross的复数形式为：backcrosses...

n.回[逆]交，回交杂种vt.使回交vi.回交...

backcross的现在进行时为：backcrossing...

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]...

glidant的音标：glidant的英式发音音标为：[ɡ'lɪdænt]glidant的美式发音音标为：[ɡ'lɪdænt]...

n.（将人或物）抛出窗外（尤指中古时代末期波希米亚民众表示愤恨的方法之一）...

echelon的音标：echelon的英式发音音标为：['eʃəlɒn]echelon的美式发音音标为：['eʃəlɑn]...

有个黄铜匠养了一只小狗, 小狗是他的宠物, 也是他的忠实伙伴.A Brazier had a little Dog, which was awith his master, and his constant companion....

nationalist的音标：nationalist的英式发音音标为：['næʃnəlɪst]nationalist的美式发音音标为：['næʃɵnəlɪst]...

加铝热剂的...

v.有雄心大志，情绪高涨，野心勃勃...

adapts的音标：...

khalifa的音标：khalifa的英式发音音标为：[kæ'li:fæ]khalifa的美式发音音标为：[kæ'lifæ]...

n.润滑油...

“堇青石”的拼音为：jǐn qīng shí...

emigrants的音标：emigrants的英式发音音标为：['emɪɡrənts]emigrants的美式发音音标为：['emɪɡrənts]...

He's not quite compos mentis , ie He's a little mad.他有点儿疯.I had had a few beers and was completely non compos mentis.我喝了些啤酒就头昏脑胀了....

Und dann kann ich an fast keinem Espresso macchiato vorbeigehen, ohne ihn zu probieren.我也很喜欢espresso马奇诺咖啡,不会错过任何一种.But in Italy, you make a cappuccino in the morning or an espresso in the afternoon.在意大利, 人们早上喝奶沫咖啡cappucc...

Coenomyidae的音标：...