中期

Tapetum cells degenerated and only ER small vesieles were the visible organelle at the 2—celled pollen stage.

绒毡层在小孢子液泡化中期开始退化，开始退化的绒毡层表现为内质网腔膨大，核周腔增大，核孔数增加。

Replacement through a retrospective study of the mid-term therapeutic effect of the treatment of the patients. Methods FromJune 1997 to March 2000, a consecutive series of 152 (152 knees) cementless TKA performed in Hessing-Stiftung was studied.

目的 通过回顾性研究一组非置换髌骨的非骨水泥型全膝关节置换术的中期临床疗效，探讨其临床应用的可行性和可靠性。

But many of the quilt designs are traditional dating back of the middle of 18 centry.

但是，许多被子的设计都是很传统的，可以追溯到18世纪中期。

Objective\ Study the contents of rare earth elements in normal fetal kidney and cerebella, and provide base data for the levels of rare earth elements in different phase o f human development.

目的 测定深圳市正常中期引产胎儿肾脏和小脑中多种稀土元素的含量，为研究人类生命不同阶段稀土元素水平提供基础资料。

Results show that Pb enrichment factors varied from 1.0～1.8 in the cultural layers, and were not quite high. However, with the history going on from the Dawenkou Culture to the Longshan Culture, the Pb enrichment factor displayed an obvious rising trend, which indicated that the Pb in the cultural layers was probably associated with the development of metallurgic activities in the middle stage of the primitive society. From 5 050 cal a BP to 4 000 cal a BP, China underwent Stone Age, Chalcolithic Age and Bronze Age in sequence. Pb dust in the atmosphere increased with intensifying utilization of copper resources, which was probably the main cause of the rising enrichment factor in the cultural layers.

但是随着时间的推移，从大汶口文化到龙山文化，Pb的富集系数有明显逐步上升的趋势，表明遗址剖面中的Pb很可能与原始社会中期发展起来的冶金活动有关。5 050～4 000 cal a BP间，中国先后经历了石器时代、铜石并用时代，到最后进入青铜时代，这个过程中铜资源利用越来越多导致产生的大气粉尘铅越来越多，很可能是YC1剖面中Pb富集系数逐步增长的主要原因。

Low magnetic susceptibility, low CaCO3, low organic carbon concentration, low C/A (Chenopodiaceae/Artemisia) ratio, low Sr concentration and, hence, high Rb/Sr ratio in the lake sediments indicate a cold but moist climate during the global Little Ice Age in the Daihai area.

在明确湖泊沉积物Rb/Sr比值古气候指示意义的基础上，通过AMS-14C和210Pb精确定年及12.08米岱海沉积岩心的Rb/Sr比值、碳酸盐含量和有机碳含量的变化，恢复了包括中世纪暖期、小冰期及全新世适宜期等典型气候事件在内的全新世环境演化过程，基本认识是：全新世早—中期9-3.5kaB.P。

Chytrid fungus was discovered in the mid-1990s, and is known to kill many frog species very quickly.

Chytrid 菌已经被发现于20世纪90年代中期，能够非常迅速地消灭多种蛙类。

In 1651 he published his translation of the De Cive under the title of Philosophicall Rudiments concerning Government and Society.

期间更大部头的作品正在进行中，最终于1651年中期面世，标题是《利维坦或或教会国家和市民国家的实质、形式和权力》，扉页雕版图非常知名，其中描绘出一个戴着王冠的巨人，一手持剑、一手持仗，巨人的身体则由无数的人民所构成。

Stretching from the Santa Cruz region to the south and to the border of San Francisco to the north, this coastside region is blessed with especially picturesque Spring and Fall seasons, typical north central coast summers with cool fog and highs in the mid-60s, as well as winters with periodic wind and rain punctuated by dramatically crisp and clear days.

从圣克鲁斯地区南部和边界旧金山以北，这coastside地区得天独厚的是风景如画的春季和秋季季节，典型的北中部海岸夏季凉爽的天气和高中期60年代，作为以及冬季定期风雨间断通过大幅清晰天。

A fax machine sales in the mid-1980s in Europe is the blogosphere, every year in the United States from 1981 the 5.6 million in 1986 to change conductometric to osyamanbe 20.6, 46.5 million in 1987 and 1988, 80 million or so. There are more than 100 22.3.1989 osyamanbe fax machines come to be seen in the United States, so that the total amount of its parameters are reached 3.4 million.

传真机的销售额在上世纪80年代中期的欧洲是每年翻一番，在美国则是从1981年的5.6万部跃至1986年的20.6万部、1987年的46.5万部和1988年的80万部左右。1989年有100多万部传真机在美国易手，使装机总量达到340万部。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。