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A Cappella is growing in leaps in bounds, and just now becoming a recognized element of the music industry at large.

这个时候A Cappella的发展可谓是突飞猛进，它已经成为音乐工业中一个公认的组成部分。

A small circle of A is in the element, but it does not have the features.

小圆圈的 A 是中的元素，但它不具有的特性。

In present engineering point of view, accurate conversion of A/D converter can't realize which is made of unstable system.

从目前的工程观点来看，一个本身不稳定的A/D变换器是不可能用来进行精确的A/D变换的。

The system is composed of MCU, A/D converter, D/A converter and power amplifier.

系统由单片机、 A/D 转换器、 D/A 转换器和功率放大器组成。

Tlc1549 . It is a 10 bit A/D converter.

这是一个10位 A / D转换。

In order to reduce the quantization error of pipelined A/D converter, a simple and efficient modified algorithm is presented.

为了减小流水线结构A/D转换器的量化误差，提出了一种简单有效的改进算法。

Furthermore, a high precision demodulation scheme by D/A converter is also proposed.

为了提高系统性能，论文还提出了一种高精度的基于D/A输出控制F-P滤波器的解调方案。

The temperature trend rate at Kushka station, which has the lowest latitude, is 0.018℃/a, and that at the other four stations is less than 0.01℃/a. The warming trend at Kushka, Almaty, and Tomsk stations, which are at relatively low latitudes, is significant, and it changed abruptly during the period from the l970s to the l980s. The rise of the minimum temperature is more obvious than that of the maximum temperature, and the warming phenomenon at Kushka station is the most significant. The precipitation trend rate at the five stations is about 0.09% per year, and the trend is not significant.

纬度最低的库什卡站气温倾向率为0.018℃/a，其他4站均小于0.01℃/a，纬度相对较低的库什卡、阿拉木图、托木斯克3站的升温趋势显著，且在20世纪70~80年代发生突变升温；年最低气温比年最高气温的升高现象明显，且纬度最低的库什卡站的升温现象最显著。5个站的降水量倾向率约0.09%/a，但增湿的趋势不显著。

The apxⅢA gene of Actinobacillus pleuropneumonie was amplified by PCR. The amplified DNA fragment 3 466bp was cloned into pMD18-T. After R.E. analysis and sequencing, the apxⅢA gene in pMD18-T was ligated into pBluescripⅡSK, the recombinant expression plasmid pET-28b/apxⅢA was constructed and analysed with R.E., the protein of apxⅢA gene expressed in E.coli BL21 was detected by Western blotting.

因胸膜肺炎放线杆菌的致病性主要是由毒素决定的，故参照猪胸膜肺炎放线杆血清2型菌株的序列(GenBankL1 2 1 4 5)设计了一对特异性引物，用PCR的方法扩增apxⅢA基因并得到了长 3 466bp的片段，然后将其克隆到pMD 1 8T中，经酶切鉴定和序列分析表明克隆是成功的；再将apxⅢA插入到原核表达载体pET 2 8b后，转化BL2 1 (DE3)，在IPTG诱导下获得高效表达，经Westernblotting检测证实表达产物有活性。

This is a testament to its timeless design. Then followed by the introduction of famous Sky Patrol portable mount in 1981, this mount was a favorite for eclipse chasers. It features a polar alignment telescope in the R.A.

这是一款经得起时间检验的经典赤道仪。1981年又开发了便携式巡天赤道仪，极大地满足了爱好者们观看日月食，该产品的特色是在R.A。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。