The raising of livestock is a major economic activity in semiarid lands, where grasses are generally the dominant type of natural vegetation.

在半干旱地区，草地通常是最主要的天然植被，而该地区主要的经济活动是家畜饲养。

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Pathological study was carried out on myelocytomatosis of diseased chickens of naturally infected and dominant type, concealed type of ELISA positive and negative control group respectively.

对禽骨髓细胞瘤病显性型病鸡、ELISA阳性的隐性型病鸡和阴性对照鸡进行了病理学研究。

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The dominant reaction pathways and the effect of reaction temperature and type of zeolites on the yield and selectivity of benzene formed during catalytic cracking of cumene were investigated.

在催化裂化反应条件下，研究了异丙苯主要裂化反应路径以及反应过程中反应温度和分子筛类型对苯产率和选择性的影响规律。

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The mineral composition of each of the Canyon's 15 dominant layers influences the stone's color, type and texture a variety that is all the more evident on the side-canyon detours.

WSJ: The Grand Canyon's Secret Network

By this time, human beings, as we know them, will have changed so dramatically that we could no longer assume we would be in a "It's Raining Men" type-world, in which women were just naturally dominant, and males the subordinate group.

BBC: NEWS | Programmes | If | The future's bright, if you're female...

Nevertheless, the deal is unnerving to dominant broadcasters that to date have ignored the online world, because it shows the type of Internet-enabled behemoth that could some day stalk their turf.

CNN: Old Media Get a New Deal