late 14c., from Old French preservatif and directly from Medieval Latin praeservativus, from stem of praeservare (see preserve (v.)). The noun is from early 15c., "a preservative medication;" sense of "chemical added to foods to keep them from rotting" is from 1875.
实用例句
1. The wood is treated with preservative to prevent decay.
这块木头用防腐剂处理过以防止腐烂.
来自《简明英汉词典》
2. Make sure the panels are treated with a wood preservative.
确保镶板用木材防腐剂处理过.
来自《简明英汉词典》
3. New timber should be treated with a preservative.
新采的圆木应进行防腐处理.
来自《简明英汉词典》
4. Salt is a preservative for meat.
盐是肉类的防腐剂.
来自《现代英汉综合大词典》
5. Though the panels come pre-treated, they needed a final sealing with two coats of preservative.