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However, chloroplast matK genes are indispensable since in nonphotosynthetic parasitic plant, Epifagus virginiana and fren, Adiantum capillus-veneris which chloroplast genome has rearrangememt, the chloroplast matK is functional even being a free-standing from with dismissed trnK exons.The chloroplasts of Psilotum, moss and liverworts all have trnK5'-matK-trnK3' structure, but it is found that matK is a pseudogene in hornwort Anthoceros formosae. Little is known in other lower land plants, it is the purpose of this thesis to examine the presence of chloroplast matK gene is these taxa.

叶绿体trnK5'-matK-trnK3'的结构在高等植物相当一致，但先前研究发现两个matK脱离trnK而存在的例子，像是叶绿体严重退化的寄生植物Epifagus virginiana及因叶绿体基因重组而导致trnK外显子丢失的铁线蕨，它们的matK仍然具有完整的开读框，显示了matK的确十分重要而不可缺失，藓苔类和松叶蕨也被证实具有trnK5'-matK-trnK3'的结构，但是在角藓中却发现其matK是伪基因。

The pump and the air blower already became present to produce the indispensable machinery, each has their form in national economy's all quarters, therefore understood that their performance is not big regarding the production help.

泵与风机已经成为了现在生产中不可或缺的机械，在国民经济的各方各面都有它们的身影，因此了解它们的性能对于生产的帮助来说不可谓不大。

Polyethylene units are indispensable for alkene plants and their normalperformance is vital to regular operation of the overall plant.

中国石油总公司辽阳分公司低压聚乙烯装置的改造、调优工程，对于烯烃厂的生产运行、质量提升已及经济效益关系重大。

In order to create architectural amiability, the economical requirement of the design, the improvement of function and restriction in the form are indispensable.

创造平易建筑需要在经济上采用限额设计、在功能上力求完善、在形式上有所制约，通过对适用、经济、美观三要素的合理综合进行优化设计，符合我国建筑发展的现状。

However, the analog-to-digital converter is indispensable.

无论如何，类比转数位介面是不可少的。

As the indispensable part of property right institution, how to consummate the apposition institution, and make it fit the requirement of the economic development and the social development, is a rigorous question which must be solved in legislation for our country in the future.

作为整个物权制度架构之不可或缺的组成部分，如何对添附制度加以完善，使它符合我国经济建设和社会发展的需要，是我国今后立法工作中亟待解决的问题。

As a scientific but extraordinary singing skill , it has signifies to have a good grip on mezza voce and to exert it felicitously in performance , because mezza voce is indispensable in revealing the inner world of a character in a specific music work .

掌握和恰当运用这种技能，在声乐演唱，表演中起着重要作用；这种技能在具体作品中的运用对主人公内心世界的诠释具有不可替代的艺术功效；同时在声乐教学中也是声音训练的一种有效手段。

Despite SPH treatment was an effective and indispensable method to hasten artificially sexual maturation, and the size-frequency distribution indicated that the most developed oocytes of those were growing from the vitellogenic stage to the final maturational phase.

观察卵径频度分布显示，虽然在人工诱导性腺成熟过程中，鲑鱼脑下垂体研磨液是非常必要之激素，可有效促进日本鳗卵细胞从卵黄蓄积阶段发育至卵细胞最后成熟阶段。

The battles of self-defence fought by the Fourth and the Fifth Detachments against the attacks of Han Teh-chin and Li Tsung-jen in eastern Anhwei and those fought by Li Hsien-nien's column against the die-hards' attacks in central and eastern Hupeh, the determined struggle carried on by Peng Hsueh-feng's detachment north of the Huai River, the expansion of Yeh Fei's forces north of the Yangtse River, and the southward movement of over 20,000 men of the Eighth Route Army to areas north of the Huai River and to eastern Anhwei and northern Kiangsu--all these were not only absolutely necessary and correct in themselves, but were indispensable for making ''.

四、五支队反对韩德勤、李宗仁向皖东进攻的自卫战争，李先念纵队反对顽固派向鄂中和鄂东进攻的自卫战争，彭雪枫支队在淮北的坚决斗争，叶飞在江北的发展，以及八路军二万余人南下淮北、皖东和苏北，均不但是绝对必要和绝对正确的，而且是使顾祝同不敢轻易地在皖南、苏南向你们进攻的必要步骤。

The battles of self-defence fought by the Fourth and the Fifth Detachments against the attacks of Han Teh-chin and Li Tsung-jen in eastern Anhwei and those fought by Li Hsien-nien's column against the die-hards' attacks in central and eastern Hupeh, the determined struggle carried on by Peng Hsueh-feng's detachment north of the Huai River, the expansion of Yeh Fei's forces north of the Yangtse River, and the southward movement of over 20,000 men of the Eighth Route Army to areas north of the Huai River and to eastern Anhwei and northern Kiangsu--all these were not only absolutely necessary and correct in themselves, but were indispensable for making Ku Chu-tung think twice before attacking you in southern Anhwei and southern Kiangsu.

四、五支队反对韩德勤、李宗仁向皖东进攻的自卫战争，李先念纵队反对顽固派向鄂中和鄂东进攻的自卫战争，彭雪枫支队在淮北的坚决斗争，叶飞在江北的发展，以及八路军二万余人南下淮北、皖东和苏北，均不但是绝对必要和绝对正确的，而且是使顾祝同不敢轻易地在皖南、苏南向你们进攻的必要步骤。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！