Microwave-assisted synthesis of 14-aryl-14H-dibenzo[a ,j] xanthene;
14-芳基-14H-二苯并[a,j]占吨衍生物的合成
Polymer-supported Sulphonic Acid Catalyzed One-pot Synthesis of 14-aryl-14H-dibenzo[a,j] xanthenes;
聚合物负载磺酸催化合成苯并占吨
The molecule has a Y style structure which is composed of two parts of butterfly-like xanthene and almost planar isobenzofuran.
合成了螺［异苯并呋喃－１（３Ｈ），９＇－（９Ｈ）－２＇－Ｎ，Ｎ－二苄胺基－６＇－二乙胺基占吨］－酮－３，Ｃ＿（３７）Ｈ＿（３４）Ｎ＿２Ｏ＿３，单斜晶系，空间群Ｃｃ，晶体学参数为ａ＝１６。
Synthesis of Xanthone Derivatives and Its Interaction with G-quadruplex
口占吨酮衍生物的合成及与G-四链体作用的研究
Its annual export reaches between 300,000 and 500,000 tons, accounting for half of the world's trade volume.
石蜡年出口量为30～50万吨,占世界贸易量的50％。
Urban centralized space heating area will increase 55 million square meters, and total will reach 0.1 billion square meters;
增加替煤液化气和轻柴油115万吨,折合164万吨标煤,约占终端能源结构的4.0%;
Pond fish culture yielded 2550 tonnes, or 6 per cent, of freshwater fish for local consumption.
年内，塘鱼总产量为2550公吨，占本地淡水鱼消耗量的6%。
During the year, pond fish culture yielded 4 500 tonnes, or 10 per cent, of freshwater fish for local consumption.
年内，塘鱼总产量为4500公吨，占本地淡水鱼消耗量的一成。
1999:1.03 billion tons of coal was unearthed in China, a third of the world production.
1999年中国开采出10．3亿吨煤,占世界总产量的三分之一。
by 2010 the population will approach 1.4 billion and the total demand for grain will be 550 million tons, based on 390 kg per person;
2010年人口接近14亿，按人均占有390公斤计算，总需求量达到5.5亿吨；
Areas hit by soil erosion has reached 360 million hectares, making up 38.2 percent of the country's total land area and registering 5 billion tons of soil losses annually.
水土流失面积达3.6亿公顷，占国土面积的38.2%，每年流失土壤50亿吨。
The predominant fishing method is trawling, which accounted for 67 per cent of the catch, or 85 610 tonnes.
主要的捕鱼方法是拖网，渔获量占年内卸下的海鱼量67%，重量达85610公吨。
The predominant fishing method is trawling, which accounted for 84 per cent of the catch, or 146140 tonnes.
主要的捕鱼方法是使用拖网，渔获量占海鱼卸下量的84%，重量达146140公吨。
and by 2030 the population will peak at 1.6 billion and the total demand for grain will be approximately 640 million tons, based on 400 kg per person.
2030年人口达到16亿峰值，按人均占有400公斤计算，总需求量达到6.4亿吨左右。
This Convention shall come into force12 months after the date on which there have been registered ratifications by at least30 Members with a total share in the world gross tonnage of ships of33 per cent.
本公约应在合计占世界船舶总吨位33%至少30个成员国的批准书已经登记之日12个月后生效。
The ship has a tonnage of twenty thousand.
这艘船的吨位是2万吨。
Tonne: Matric tonne, equivalent to 0.984 long (imperial) tons, or, 102 short (US) tons.
公吨:十进制的吨,等于0.984长吨（英制）或1.102短吨（美制）。
engine room long ton
长吨(1016公斤
cargo carrying capacity
净载货吨位载货吨位载货吨位
Short ton: American ton (2000 lbs.) equal to 0.893 long (imperial) tons, or 0.9072 metric tonnes.
短吨:美国制的吨（2000磅），相等于0.893长吨（英制）或等于0.9072 公吨。
Scheduled Import in Tones per Year
预计进口量(吨/年)