TS的中文意思、音标与词形变化

[计] 正文段

n a base found in DNA (but not in RNA) and derived from pyrimidine; pairs with adenine n one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose) n a unit of weight equivalent to 1000 kilograms n the 20th letter of the Roman alphabet n thyroid hormone similar to thyroxine but with one less iodine atom per molecule and produced in smaller quantity; exerts the same biological effects as thyroxine but is more potent and briefer n hormone produced by the thyroid glands to regulate metabolism by controlling the rate of oxidation in cells