directional cross meaning in English

定向交配

By analyzing the students ' constitution in our college and the characteristics of directional cross - country combining the geographical superiority in our new campus , the paper puts forward that the directional cross - country has wide development space and should be extensively and quickly spread in our college
摘要文章通过对南通过航运职业技术学院学生身体素质分析以及天星湖校区的地理环境优势，结合定向越野运动的特点，认为定向越野运动在我院具有广泛的发展空间，应该迅速在校内以多种方式普及。
These internal - tide deposits can be classified into four basic types according to their features , i . e . , bi - directional cross - laminated fine - grained sandstone , unidirectional cross - bedded and bidirectional cross - laminated medium - grained to fine - grained sandstone , rhythmic thin alternating beds of sandstone and mudstone , and oolitic limestone
这些内潮汐沈积进一步划分? 4种类型：双向交错纹理细砂岩型、单向交错层和双向交错纹理中细砂岩型、韵律性砂泥岩薄互层型和鲕粒灰岩型。