1·He said that the deal should not be seen as a precursor to a merger.
他说这次交易不应该被看作是合并的前兆。
—— 《柯林斯英汉双解大词典》
2·Impatience is often a precursor to self-punishment, so stop way before the red light hits.
焦躁通常是自我惩罚的前兆，因此，你得赶快在红灯亮起之前停下来。
3·The current huge gaps, in income levels, opportunities, and health outcomes, are a precursor for social breakdown.
目前的收入水平、机会和健康结果的巨大差距是社会崩溃瓦解的一个前兆。
4·The meeting was a precursor to the larger G-20 meeting taking place in Seoul on November 11 and 12.
这次会议将是于今年的月的11日至12日在汉城召开的较大的20国集团会议的前兆。
5·The stabilisation of prices turned out to be a precursor to broader economic recovery.
因此，此时住房价格的重新趋稳被视为整体经济恢复的一个前兆。
1·They alter the way it cleaves amyloid precursor protein.
它们改变了这个酶切割淀粉样蛋白前体的方式。
2·This is a precursor to heparin, an important anti-clotting agent that has, at present, to be extracted from blood, rather than being synthesised. Heparan sulphate is not a protein.
硫酸乙酰肝素是肝磷脂的前体，是重要的抗凝剂，目前只能从血液中提取，从未成功合成提取过，它并不是蛋白质，而是一种富硫似糖的分子，经常参与糖基化反应。
3·Amyloid plaques form when a molecule called amyloid precursor protein (APP) is chopped up by two enzymes known as beta-secretase and gamma-secretase.
当一种叫淀粉样前体蛋白（APP）的分子被两种酶——分别叫作贝塔-分泌酶和伽玛-分泌酶——切断时就形成了淀粉样斑块。
4·Edwin Wintermute and his colleagues at Harvard have engineered yeast cells to carry out two of six steps in the pathway needed to make lysergic acid, the precursor of LSD.
埃德温·温特·姆特(Edwin Wintermute)和他在哈佛的同事已经通过基因工程改造了酵母细胞，在产生麦角酸——LSD的前体——的六步反应路径中已经实现了其中的两步。
5·The researchers basically amplified and then short-circuited E. coli's internal machinery for producing large fatty-acid molecules, enabling them to convert precursor molecules directly into fuels.
研究者从根本上放大并缩短了大肠杆菌产生大分子脂肪酸的内部机制，是的他们能够直接将前体分子转化为燃料及其他化学品。