They lie flat, facing backwards, until they're needed for grooming. Then the spikes spring upwards.
爪形倒钩面朝后，直到需要用它们来梳理时，这些尖刺向上弹起。
| 单词 | spring spike |
| 例句 |
原声例句
VOA常速英语_科技 They lie flat, facing backwards, until they're needed for grooming. Then the spikes spring upwards. 爪形倒钩面朝后，直到需要用它们来梳理时，这些尖刺向上弹起。 VOA视频精选 They lie flat, facing backwards, until they’re needed for grooming. Then the spikes spring upwards. 爪形倒钩面朝后，直到需要用它们来梳理时，这些尖刺向上弹起。 |
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