一分子的

Then a new way was defined to prove that the unique set of sequences equivalent to context-free languages can be obtained by mixed self-assembly of mole-cules with 1-,2-,3- sticky ends,which is a supplement for Winfree's theory that the self-assem-bly of dendrimer nanostructures is equivalent to context-free language.

另一方面，文中定义了一种新的通过上下文无关语言通过自装配产生线性语言的方法，即证明了等价于上下文无关语言的特定序列集能通过1-，2-，3-粘头分子的混合自装配产生线性语言，同时，这是对Winfree关于树状纳米结构自装配等价于上下文无关语言理论的一个较好的补充。

These observations may provide a vaccine strategy for cancer therapy through the induction of the autoimmunity against the molecules associated with tumor growth in a cross-reaction with a single xenogeneic homologous gene and may be of importance in the further exploration of the applications of other xenogeneic homologous genes identified in human and other animal genome sequence projects in cancer therapy.

这些结果提示，通过单个异种同源基因以交叉免疫的方式打破肿瘤生长相关分子的自体免疫耐受是一种新的肿瘤疫苗治疗途径，并显示出进一步探索人类和其他种属的异种同源基因在肿瘤免疫治疗应用中的重要性。

In the hypothesis, it is assumed that the photoreceptor outer segment is a cylindrical-like structure, while a photo enters the outer segment, the possibility of the impact between the photon and a photopigment molecule is maximal if the photon's travel path parallels to the axis of the cyclinder.

其理论系假设光感细胞的外节为一圆柱状结构，当光子进入到光感细胞的外节部分时，若其路径与此柱状结构的轴向平行，其碰撞到光色素分子的机率会最高，因此所产生的响应将最大。

The compound is an ionic compound consisting of a cation NH(subscript 4 superscript +) and an anion C6H2N3O(subscript 9 superscript -), and it is the mono-substituted salt of TNPG. Since the existence of complicated hydrogen bond networks and electrostatic attraction between NH(subscript 4 superscript +) cation and C6H2N3O(subscript 9 superscript -) canion, the compound possesses better stability and low sensitivity.

该化合物是由一个铵根离子与一个一价的三硝基均苯三酚负离子相结合而形成的离子型化合物，分子中存在的大量氢键及铵根离子与三硝基均苯三酚负离子之间的静电引力使得该化合物具有较高的热稳定性和较低的感度。

The substituted half-sandwich titaconece with bulky alkoxyl group [CpTiC1〓 or CpTi 〓] or indene ring can not be fluorinated by BF〓·Et〓O under the selected condition, but still coordinates with the BF〓, this coordination then enhances the steric effect that stabilizes the precursor and hinders the reduction of the Ti to the Ti species, reflected in the decrease in polymerization activity.

但是这个转化受主催化剂分子的空间位阻和聚合反应温度的影响，当主催化剂为大位阻的烷氧基取代茂钛络合物或茚钛络合物时，在一般的聚合温度下BF〓不能对它们进行氟化，但可以和其中的OR配位，这种配位进一步加剧了空间位阻，从而阻碍了活性中心的形成，导致催化活性的下降。

My late father Dr Sulivan Keita was the managing director of Keita and Associates and he was the personal adviser to the former head of state before the rebels attacked our house one early morning and killed my mother and my father in cold blood.

我已故的父亲何沙利文凯塔是凯塔和联营公司董事总经理，他是前叛乱分子的个人顾问，前国家元首攻击我们的房子一清晨，杀死我的母亲和冷酷的父亲。

As a new-borned alternative at the turning point of the labor-intensive society change into knowledge -intensive society, creative industry is active in the economical system among the most advanced cities, like Shanghai and Beijing, and become the indispensable element of the city multiple industry system.

创意产业作为中国社会从劳动密集型社会向知识密集型社会转化过程中的新生事物，正活跃在上海、北京等中国最先进、最发达的大城市的经济体系中，成为其多元的城市产业结构不可或缺的一分子，并且越来越为人们所关注。

This time the situation may be aggravated by the return of several powerful Mafiosi who fled to America after most recent such war in the 1980s.

这一次的形势可能会因为在20世纪80年的权力斗争之后逃往美国的几个强有力的黑手党分子的归来而加剧。

The establishment and relaxation processes of the transient gratings, which are formed by two recording 514nm beams with different polarization directions, SS, PP, SP and ±45℃, are investigated. Using the weak absorption of the chromophores at 632. 8nm and the positive dichroism of the chromophores molecules, a kind of bi-photonic transient gratings, owing to the periodic distribution of Trans and Cis isomers, is established first time in azo-dye doped polymeric bulk sample.

实验考察了两束514nm的写入光在不同偏振情况下（SS，PP，SP和±45），在样品中形成的瞬态栅的建立和弛豫情况；利用偶氮生色团在632.8nm波段的微弱吸收和生色团分子的正二向色性，首次在块状偶氮聚合物材料中形成一种基于生色团反式和顺式异构体密度分布的双色光瞬态栅；利用瞬态栅的快速建立和弛豫，考察了其在衍射型全光开关方面的潜在应用。

After the calculation, the physician can read the numbers of pulses that would be required for this ablation, and the sizes of the various pulses created with various spot scanning ,next ,the surgeon is able to utilize the star s4 excimer laser to create a prevue lens with this calculated ablation so that the patient can subjectively assess the vision quality benefits of this particular correction.

在进行计算以后，医师能读取切削手术必须的脉冲数量，并且由变量光斑扫描所带来的不同脉冲的大小，然后，外科医生能运用VISX STAR s4准分子激光子童打制虚拟角膜镜片，这样医生可以主观地评估这一特定的矫正手术的视觉质量的优越性。

The labia have now been sutured together almost completely.The drains and the Foley catheter come out at the top.

此刻阴唇已经几乎完全的缝在一起了，排除多余淤血体液的管子和Foley导管从顶端冒出来。

To get the business done, I suggest we split the difference in price.

为了做成这笔生意，我建议我们在价格上大家各让一半。