特伦特承认，在塑料袋中计算出藻类合适的株数，以及在工程系统中使藻类作为一种可替代现有化石燃料的低成本燃料，具有一定的挑战性。
Trent acknowledges that challenges remain in figuring out the right algae strains, and in engineering the system to make algae biofuels a cost-effective alternative to existing fossil fuels.
下一步就是缝合服装拱起的部分，例如领子、克夫和袋盖，缝角有一定的技术要求。
Bagging out garment sections such as collar, cuffs and pocket flaps is the next stage in the development where technique is required for stitching around the corner.
我厂拥有多年的礼品袋、服饰、家纺的生产加工经验，在行业中具有一定的影响力。
We have experience with years of gift bags and home textiles production, have a certain influence on the industry.
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