Tribenuron-methyl is synthesized via ring-opening reaction, phosgenation and condensation.

经过开环、光气化、缩合等一系列反应制备了苯磺隆。

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Polylactic acid synthesis in two major ways:direct polymerization and lactate lactide ring-opening polymerization.

聚乳酸的合成方法主要有两种：乳酸直接聚合和丙交酯开环聚合。

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There are two main methods to synthesis PLA, condensation polymerization of lactic acid and ring-opening polymerization of lactide.

聚乳酸的合成主要有两种方法：乳酸直接缩聚和丙交酯的开环聚合。

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Visits to the homes of fraud-ring members revealed merchandise purchased by opening new credit card accounts with stolen identities.

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Typically, the chief executives of big-IPO companies show up to ring the opening bell, a publicity stunt, but a coveted invitation nonetheless.

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Top executives of Fortress Investment Group (nyse: FIG - news - people ) also showed up in February to ring the opening bell at their debut.

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