倒毛通常是指人的睫毛倒到眼里的现象。在婴儿中比较常见。小儿在发育过程中，鼻梁根部宽蹋，易使下眼睑睫毛内翻。有的孩子发育较胖，更易形成倒睫毛。倒睫毛长期刺激眼球，会使孩子眼球不舒服，经常流泪。孩子用手去揉擦，时间一长，便会引起慢性结膜炎和角膜炎、角膜云翳，影响视力。
down pile making ; trichiasis ; disobey ; defy ; resist ; oppose
此犬颈毛倒竖，呲牙咧嘴地恶嚎，又吠叫着退却，逃跑时结结实实尿了一路。
The pup raised her hackles, growled, barked and backed up, releasing a huge trail of urine as she escaped.
当助训员逐渐接近犬，他可能会在犬的行为中，注意某些冲突的征象(即，如上所述的颈毛倒竖、明显升高的吠叫，撤退等等)。
As the helper gets closer to the dog, he will probably notice some signs of conflict (stress) in the dogs behavior (i. e., raising hackles, high pitched bark, retreat).
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