齿状突起

The differentiation states of costae indicates the ways they absorb and transport water, and their ability adapting to the dry conditions, which was elucidated by the following examples: Brachythecium plumosum, because of its thin cell-walls in the costae and the absence of hydrome, assistant and steroid cells, can absorb water and nutrition under shady and moist conditions; Plagiomnium rostratum, though often grows in shady and wet condition, has hydrome and steroid cells, a feature similar to those of xeric mosses, which endows it to grow in the conditions with periodical drought stress during its life cycle; Hygrohypnum luridum is characterized by its slender leaves with only one layer of cells, the thin cell-walls, the absence of filaments on the leaf surface, and the fewer layer cells in the costae, the absence of hydrome and steroid cells. These features make it adaptable to aquatic environments. For Pogonatum inflexum and Atrichum undulatum, their ventral surfaces covered with lamella, while for Racomitrium japonicum, Thuidium cymbifolium, Macromitrium ferriei, Diphyscium fulvifolium, Barbula unguiculata and Ceratodon purpureus, their leaves are strongly mammillose or papillos. Such appendiculate structures made them adaptable to thy conditions.

例如，荫湿生环境下的羽枝青藓Brachythecium plumosum，其中肋细胞胞壁较薄，无导水主细胞和副细胞的分化，也没有厚壁细胞分化，能够在阴湿环境下吸收水分和养分；钝叶匍灯藓Plagiomnium rostratum具有与旱生藓类植物相似的中肋结构，叶片较厚，中肋具导水主细胞，中肋背面具厚壁细胞，这些特点使该种藓类植物能够分布于间隙性干旱胁迫的环境中；水灰藓Hygrohypnum luridum叶片纤细柔弱，仅1层细胞，细胞胞壁薄，叶表无附属结构，中肋细胞层数少，无导水主细胞分化，也没有厚壁细胞，这些特点使得水灰藓'能够生长在水生环境中；东亚小金发藓Pogonatum inflerum和波叶仙鹤藓Atrichum undulatum的叶腹面覆盖着栉片，东亚砂藓Racomitrium japonicum、大羽藓Thuidium cymbifolium、福氏蓑藓Macromitrium ferriei、东亚短颈藓Diphyscium fuhifolium、扭口藓Barbula unguiculata和角齿藓Ceratodon purpureus的叶片表面有乳头状突起或疣状物，这些附属结构使它们能够适应于旱生的环境中。

Tritor Hardened elements of the crushing surface of a chimaeroid tooth plate.

磨状齿面在银鲛目的牙齿上的瘤状突起。

Inner filaments with 1 irregularly denticulate tooth on each side at base; ovary with concave nectaries at base covered by hoodlike projections.

内轮花丝具1具不规则小齿齿在每边在基部；子房具凹陷蜜穴在基部被钩状突起覆盖。

Inner filaments entire at base or, if toothed, teeth never denticulate; ovary with concave nectaries at base not covered by hoodlike projections.

从未或者，请问如果齿的内轮花丝基部全缘；子房具凹陷蜜穴在基部不被钩状突起覆盖。

Lower leaves entire or repand; fruit torulose, with stellate and subsetose simple trichomes; subapical horns 0.5-1.8(-2.2) mm, erect or divaricate-ascending, straight; valves not extended beyond horns into stylelike apex

下部叶全缘的或残波状；果近念珠状，具和subsetose单；近尖端的角0.5-1.8(-2.2)毫米，上升直立或极叉开，直；在进stylelike先端角状突起以外裂爿不延伸 1 T。 quadricornis 四齿芥

The steps are rough due to many dentations at the step edges, which are oriented along the [111] direction.

台阶的粗糙化是由于在其边缘沿[111]方向定向形成许多齿状突起。

Sharks are fish with cartilage instead of skeletons, sharp and pointy teeth, and denticles that protect them from injury.

可知细齿状突起是用来保护它们本身不受伤害，而非牙齿，故选A。

It can be distinguished from other congeners by having a coiled, ribbon-shaped embolus and a spatulate tibial apophysis widened distally and densely covered with fine denticles on its distal end.

铲形马蒂蛛雄蛛触肢之插入器为带状，末端回转一圈，并且触肢胫节突起呈铲形，末端扩大、截平，并有细齿状突起，与本属其他种类可资区别。

It can be distinguished from other congeners by having a coiled, ribbon-shaped embolus and a spatulate tibial apophysis widened distally and densely covered with fine denticles on its distal end. The female remains unknown.

铲形马蒂蛛雄蛛触肢之插入器为带状，末端迴转一圈，並且触肢脛节突起呈铲形，末端扩大、截平，並有细齿状突起，与本属其他种类可资区别。

"An elevated, irregularly toothed ridge on the stigmas of certain flowers."

某些花的柱头上的突起的、非规则齿状的脊状突起。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。