Eight substituted ureas herbicides were synthesized with bis(trichloromethyl) carbonate(BTC). The production structures were identified by elemental analysis and IR.

用二（三氯甲基）碳酸酯（BTC）代替光气，“一锅法”合成了8种取代脲类除草剂，产物结构经元素分析、IR确证。

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Wood is the product of cambial activity in trees, and the seasonal activity style of cambium directly influences wood biomass production, structures and properties.

木材（次生木质部）是树木形成层细胞分化的产物，形成层的活动方式不仅影响木材的产量，而且影响木材的结构和性质。

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This division is responsible for the production of tubular steel and long steel structures.

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The research team is currently investigating a laser lift-off technology to facilitate the mass production of flexible LIBs and 3D stacking structures to enhance charge density of batteries.

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The drill ships and production platforms required to undertake such deep drilling are massive floating structures, much larger than the largest aircraft carriers and costing well over a half billion dollars (and close to a million dollars a day to rent).

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