系统发生

The titer variation to juvenile hormone of female worms was detected by GC-MS system, from which there was an obvious correlation between variation regularity to juvenile hormone and vitellogensiss regularity in Chrysopa septempunctata.

通过GC-MS系统测定了大草蛉雌虫体内保幼激素Ⅲ滴度的变化，从中可以看出大草蛉体内保幼激素滴度的变化与卵黄蛋白发生存在明显的相关性。

Two trains collied each other at the above-ground-portion of the Washington subway system during the rush hour around 5 o'clock in the afternoon.

两列列车在华盛顿地铁系统的地面部分相撞，事故发生在下午五点左右，正值晚间的交通高峰期。

Species richness and Pielou evenness index were used to measure species diversity. Species richness in polluted area was 32-67, while in control area it was 47-82. Pielou evenness index of tree layer was 0.1161-0.8509, while those of shrub layer and herb layer were 0.1763-0.3249 and 0.0443-0.2601, respectively. The results showed that both species richness and Pielou evenness index were influenced by the point source pollution. Species importance values showed significant differences between polluted area and control area. Dominance of different species had changed, and some species even disappeared under the pressure of pollution, indicating a process of species replacement in plant communities. Such species replacement can provide a scientific basis for species selection for restoration of human-damaged ecosystem. The natural regeneration of Quercus variabilis was insensitive to pollution, while Cupressus funebris was effected seriously.

仅在污染区中出现的物种数量远低于仅在对照区中出现的物种数量；(2)可分出4种基本的群落类型：马尾松林、柏木林、栓皮栎林和马尾松＋栓皮栎林，各群落特定层次的物种丰富度指数以及Pielou均匀度指数在污染区与对照区之间存在显著差异；(3)污染胁迫下，物种在群落中的生态优势度发生了变化，反映了群落中不同物种相互替代的过程，这种物种的替代可为今后受损生态系统人为恢复过程中物种的筛选提供一定的理论参考；(4)对群落中王要物种更新的调查发现：栓皮栎林对污染不敏感；柏木林污染区与对照区幼苗数量及分布格局均有明显差异，污染条件下群落未来演替受到严重干扰。

Deflective displacement of a mining pipe under the dragging force of the vessel and the combining effects of winds, waves, and currents were discussed.

深海采矿系统中，扬矿管受采矿船的航行速度及海浪、海流等因素的影响会发生横向偏移的问题。

SQUA genes of Dendrocalamus latiflorus were sequenced, and phylogenetic form on SQUA genes in angiosperms was analyzed. Relative rate and adaptive evolution after SQUA gene duplication in recent common ancestor of monocots and eudicots were analyzed using the methods of relative rate test, statistic on synonymous and non-synonymous coden substitution sites and likelihood rate test.

测定了麻竹的SQUA基因序列并分析了被子植物中SOUA类基因的系统发育式样；采用相对速率检验、同义与非同义置换位点统计以及似然比检验方法，分析了单子叶和真双子叶植物最近共同祖先中SQUA基因发生基因重复后的进化速率与适应机制。

Zoology environment aggravation basically behaves the resource that it is water rare be short of and development uses rate low; extensive cultivate course of study to make quality of agricultural zoology environment deteriorates quickly; prairie ecosystem suffers excessive depasture wait for a reason to destroy serious, natural prairie produces structural sex decline, vegetation productivity is reduced significantly.

生态环境恶化主要表现为水资源稀缺且开发利用程度低；粗放型的种植业使农业生态环境质量迅速退化；草原生态系统受过度放牧等原因破坏严重，天然草原发生结构性衰退，植被生产力显著降低。

In the course of the impulse through underground mediator, because the physical property and the geometric property of mediator is non-uniform, wave form and wave amplitude will change very much and the impulse after shock、antenna direction figure、the couple degree of ground surface、system interfere、non-uniform of the underground mediator、reflection surface's rough cause the disturb of radiation scatter and diffract will complex the figure .

脉冲在通过地下介质的过程中，由于介质的物性和几何性质的不均一性，波形和波幅将发生较大的变化，而脉冲余振、天线方向图形、天线的地表偶合程度、系统内部的干扰、地下介质的不均匀、反射面不光滑等引起的辐射效率、散射的变化以及剖面旁侧的绕射等干扰，均使实时记录图像复杂化。

Surface coatings are open dynamitic systems in aquatic environments, in which various components could synthesize, accumulate, transform, and degradation.

生物膜在自然水体中是一个开放的动力学系统，水环境中的各种成分可以在生物膜上发生着合成、聚结、转化、降解等作用。

PURPOSE: To validate the Ectasia Risk Score System for identifying patients at high risk for developing ectasia after laser in situ keratomileusis.

目的：验证用来鉴别LASIK术后具有较高风险发生角膜扩张的患者的角膜扩张风险评分系统。

PURPOSE: To validate the Ectasia Risk Score System for identifying patients at high risk for developing ectasia after laser in situ keratomileusis.

摘要翻译：目的：验证用来鉴别LASIK术后具有较高风险发生角膜扩张的患者的角膜扩张风险评分系统。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。