查询词典 table tennis ball

The initial activity is only a game, the ball is Qinger flexible materials, beat cigar lid-like wooden board, the same as in table tennis playing, it called the "table tennis ." Around 1900, due to the development of light industry, the ball was replaced by the hollow ball made of celluloid.

最初只是一种活动性游戏，球是用轻而富有弹性的材料制成，拍子阳雪茄烟盒盖之类的木质板，象打网球一样在桌上打，故称之为"桌上网球"。1900年左右，由于轻工业的发展，球才改成用赛璐珞制成的空心球。

The 28th international table tennis federation world after the modification of the rules , the ball from behind high ball down, so that can serve force is not legal service. In the 1960s, along with the development of tennis sport service quality is improved greatly, and pay more attention to the rotation speed, and serve the high toss service, but due to not to bring great threat returner and so on the new rules, not too many restrictions on serving technology.

第28届世乒赛后，国际"乒联"对规则进行了修改，规定了抛起的球从最高点下降时才能击球，因此认定合力发球是不合法发球。60年代随着乒乓球运动的发展，发球质量也有了很大的提高，更注重发球的旋转与速度，开始出现了高抛发球，但由于并没有给接球方带来很大的威胁，所以，规则并未对这些新的发球技术进行过多的限制。

The event with Athens Olympiad one kind , Beijing Olympiad is 28 major terms , this 28 is: Track and field , racing boat , badminton , softball , basketball , football , boxing , skin rowing boat , bicycle , fencing , gymnastics , weight lifting , handball , field hockey , judo , trip and fall , aquatics , modern pentathlon , baseball game , horsemanship , Taekwondo , tennis ball , table tennis ball , shooting , archery , triathlon , sailing boat sailboard and volleyball.

与雅典奥运会一样，北京奥运会的比赛项目是大项28项，这28项为：田径、赛艇、羽毛球、垒球、篮球、足球、拳击、皮划艇、自行车、击剑、体操、举重、手球、曲棍球、柔道、摔跤、水上项目、现代五项、棒球、马术、跆拳道、网球、乒乓球、射击、射箭、铁人三项、帆船帆板和排球。

It's quite unbelievable that an eye ball is the same size as a table tennis ball.

这是相当令人难以置信的那一球是眼睛同等大小的乒乓球。

States is China's table tennis ball, the strengths of Chinese table tennis.

乒乓球是中国的国球，所以中国的强项是乒乓球。

A 40 mm table tennis ball is slower and spins less than a 38 mm one.

阿40毫米乒乓球的速度和旋转不到38毫米的。

China is the country's table tennis ball.

乒乓球是中国的国球。

Q: What is a table tennis ball made from?

乒乓球是由什么物质做成的？

Wuji style supplies the company's operating establishments in the world's largest base of small commodities, Yiwu, with the exception of main plant and the League of manufacturers to produce a variety of sports supplies, the main species have football, basketball, volleyball, table tennis, badminton, tennis, baseball , massage ball, flower ball, Yanggakdo ball, sticky tap, table, ball racks, ball plates, ball nets, sport planes, skates, tug-of-war rope, rope skipping, fitness circle, Frisbee, darts, gym products, small fitness products, dumbbell rack, sports cars such as sports equipment and educational supplies, has become China's largest professional sports supplies production and management companies.

无极文体用品公司的经营场所在世界最大的小商品流通基地义乌市，除主营本厂和各联盟厂家生产的各种文体用品，主要品种有足球、蓝球、排球、乒乓球、羽毛球、网球、棒球、按摩球、花球、羊角球、粘拍球、球台、球架、球板、球网、运动架、溜冰鞋、拔河绳、跳绳、健身圈、飞盘、飞镖、健身房产品、小型健身产品、哑铃架、体育车等各种体育器材和文教用品，已成为中国规模最大的专业性文体用品生产经营企业之一。

Then they use hollow ball instead of elasticity is small, and proves that the racquet, instead of the board in the table tennis for this new ","this is the origin of the name of two.

后来他们改用空心的小皮球代替弹性不大的实心球，并用木板代替了网拍，在桌子上进行这种新颖的&网球赛&，这就是table tennis得名的由来。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。