青年中文back crossing的意思
back crossing中文翻譯：
回交
crossing───v.橫越；交叉；反對；橫傳；畫橫線于（cross的現在分詞）；n.人行橫道；十字路口；（海洋或寬闊江河的）橫渡；（國與國的）過境處；穿越；中殿和耳堂相交處；雜交
no crossing───禁止穿行；請勿跨越
railway crossing───公路鐵路交叉口；鐵路平交道口；鐵路道口
book crossing───圖書交叉
dulcimer crossing───揚琴穿越
crossing over───互換；[遺]交換，交叉
pedestrians crossing───人行橫道
crossing out───刪去；注銷
anile crossing───阿尼爾交叉
Martin knew of the enormous gulf between him and this man - the gulf the books had made; but he found no difficulty in crossing back over that gulf.───馬丁知道他跟自己之間有一道很大的鴻溝——那是讀書造成的。他要是愿意跨回去倒也容易。
This was only the third vehicle crossing of Antarctica in history, and the first to get there and back.───這是歷史上僅有的第三次駕駛交通工具的南極穿越，更是第一次往返。
great relief to be back on dry land after such a rough crossing.───渡過洶涌澎湃的大海回到陸地后使人長舒一口氣。
Back crossing allows a desirable trait to be introduced into an existing useful line.───回交可以將一個需要的性狀引入一個已存在的有價值繁殖系。
To eliminate the undesirable characteristics and develop useful ones, back crossing is carried out.───回交可以消除不需要的性狀以及加強有用的性狀。
All of the F1 plants showed complete male sterility, and the seeds of BC1 were obtained by back-crossing with Chinese Spring pollen.───雜種F1高度雄性不育，用中國春花粉與其回交可獲得BC1代種子。
They flung themselves on him, yanked his legs back, crossing them so that his knees splayed out.