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| English | Chinese |
| four-abreast hitch | 四马并驾 |
| four-H Club | 农村学习小组一种地方性的农村青少年组织[美] |
| four-horse team | 四套马指由四匹组成一套，拉一辆车的马 |
| four-molter | 四眠蚕在自然条件下，每世代蜕皮4次的蚕 |
| four-moulter | 四眠蚕在自然条件下，每世代蜕皮4次的蚕 |
| four ring snaffle bit | 双环衔铁两侧共四环 |
| four rowed barley | 四棱大麦 (Hordeum vulgare subsp. tetrastichum) |
| four-toothed wether 2 | 岁阉公羊 |
| four-way cross | 四元杂种 |
| four-way cross | 四品种杂种 |
| four-way cross | 四元杂交 |
| four-way cross | 四品种杂交 |
| four-way rotational crossing | 四元轮回杂交 |
| four-way rotational crossing | 四品种轮回杂交 |