1. A regulatory agency should ensure that helium is used carefully. 应该有一个监管机构确保氦的使用是谨慎的。
2. Studies of plants have now identified a new class of regulatory molecules called oligosaccharins. 对植物的研究已经发现了一种叫做寡糖的新一类调节分子。
3. How can the hormone adrenaline that does not act directly on the brain have a regulatory effect on brain function? 肾上腺素不直接作用于大脑，怎么会对大脑功能产生调节作用呢？
4. They have been looking to trust companies in particular to trim their balance sheets and lessen their regulatory burden. 他们一直指望着给那些努力削减其资产负债表的信托公司放贷，减轻其监管负担。
5. This is accomplished by a complex system of chemical messengers that in plants include hormones and other regulatory molecules. 这是通过一个复杂的化学信使系统来完成的，在植物中包括激素和其他调节分子。
