1. For years, art, antiques, and livestock have been sold at auction. 近几年来，艺术、古董，和宠物在拍卖网上被出售。
2. Farmers are attempting to produce transgenic livestock already but not efficiently due to the minimal ability to alter embryos genetically as stated above. 农民正在尝试生产转基因家畜，但不是很有效，原因是像上面说的那样，遗传性改变胚胎的能力极小。
3. Some ideas were contradictory, he said - for example, one solution to emissions from livestock was to keep them indoors, but this would damage animal welfare. 他说，有些概念是相互矛盾的，例如，一种解决气体排放的办法是把家畜喂养在室内，但是这会损害动物权益。
英英解释
n.
1. not used technically; any animals kept for use or profit
