子器

Ten or more archegoniums occurred at the edge of megagametophyte, and the egg was found after two mitosises.

十多个颈卵器在同一个成熟雌配子体上发生，两次有丝分裂后，形成卵细胞。

The set includes a golden fertility idol pen holder , an Ark of the Convenant business card holder and a Holy Grail paperclip holder .

该套桌饰包括一个催子菩萨形状的金色笔筒，一个方舟形状的合同名片夹和一个圣杯形状的回形针收集器。

Cytoembryological studies were employed to reveal theorigin of haploid and to determine the cytological factersrelating to the production of diploid polyembryony withinone embryo sac occurring in natural population of apolyembryonic line SB-1 of O.sativa.

SB-1自然群体中的单倍体来源于助细胞无配子生殖。细胞胚胎学研究表明，卵器中的一个或两个助细胞能在受精之前发育成胚，其发生率分别为观察子房数的2.24%和1.75%。

The spore germination and gametophyte development of 21 ferns are studied. It indicates that :① the development period of prothallium and young sporophyte of the same species is different due to seeding time of spores;② the optimal temperatures of spores germination and gametophyte development of 21 ferns are about 15 -24 ℃;③ the rate of spore germination of rare ferns is much lower than the ferns which occur large populations in nature;④ the treatment with GA 3 can accelerate the germination of the spores;⑤ the prothallium changes from large to small, green to yellow when young sporophyte comes out. The prothalliums of all 21 ferns die away after the appear of the 3rd leaf of sporophytes;⑥ shapes of the 1st and 2nd leaves of the young sporophyte are different from those emerged later;⑦ spores cultured in dark can not germinate;⑧ a prothallium can develop only one young sporophyte though it has many archegoniums, and the spore propagation with leaf mould substrate is an economical method.

摘 要：以腐叶土为培养基质，对 21 种蕨类植物进行了孢子萌发和原叶体发育的研究，结果表明：①不同时期播种的同种蕨类的孢子，发育出原叶体和幼孢子体所历经的时间长短不同；②孢子萌发和配子体生长发育的适宜温度约为 15 ～ 24 ℃；③稀有蕨类的孢子萌发率低，而在野外能形成较大种群的蕨类的孢子萌发率高；④用 GA 3 处理孢子可以促进萌发；⑤当原叶体上长出幼孢子体时，原叶体由大变小，由绿变黄， 21 种蕨类的原叶体都在幼孢子体上长出第 3 片叶时消失；⑥幼孢子体上长出的第 1 、 2 片叶在形态上与以后长出的叶不同；⑦孢子萌发需要光；⑧ 1 片原叶体尽管有多个颈卵器，但仅发育出 1 株幼孢子体；⑨利用腐叶土进行蕨类孢子繁殖是一种经济实用的繁殖方法。

In this paper the retortion piezoelectric actuators were used to control vibration with the optimal initiative and PIE control method in a single-Link FRM system.

本文提出了用扭转压电振子作为主动抑振的动力源，以代替传统的用关节电机抑振的不足，为此研制了压电式主动关节抑振器，建立了单连杆柔性机械臂实验系统，采用振动抑制最有效的主动控制技术和PID控制算法实施系统的抑振。

The optimal design model of taper roller bearing with constraint is presented in this paper.

建立了带约束条件的圆锥滚子轴承优化设计数学模型，针对标准SA算法收敛速度缓慢的弱点，通过对标准模拟退火算法的内外循环中加入记忆器来改进算法。

The first of these filters is known as the child selector hack.

这些过滤器中的第一个称为子选择器招数。

There formed segregating cavities between spermatocyte cell-wall and spermogonium cell-wall and osmiophillic layers outside spermatocyte cytoplasmalemma, which indicated that the spermatocytes had begun to gradually break away from the male gametophytes and embark on independent development.

精母细胞与精子器的璧细胞之间形成了分离腔，在精母细胞质膜外形成了嗜锇层，这些结构的形成说明精母细胞已经开始与雄配子体逐渐分离，进入独立发育的阶段。

Sales of its products include: LM series of precision rails, precision Ball Spline, precision ball screw and associated support components, precision cross-roller working platform, rail actuators, Zhixian Qiu Waterloo Block, guided packages, and various derivative - Spherical and even the axis of linear motion products such as grease.

其销售产品包括： LM系列精密导轨、精密滚珠花键、精密滚珠丝杆及配套支撑部件、精密交叉滚子工作平台、导轨引动器、直线球滑座、导套、导柱及各种球面连轴节和直线运动产品润滑脂等。

A turbo coder codes the subframe data comprised of the data bit stream and the specific bits.

快速编码器编码由数据位流和特定位组成的子帧数据。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。