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- DDTs was the primary compound in soil samples,accounting for 98.9% of the pesticides POPs. The source of DDTs was garden soils in city parks. 其中滴滴涕占总有机氯农药类POPs物质的98.;9%25;是北京地区土壤中残留有机氯农药类POPs物质的主要成分;城市公园、园林土壤是城市滴滴涕的主要污染源
- The effects of primary compounds on the property of the potting compound were studied and the optimum technological factors were determined. 讨论了其主要组分对灌封料性能的影响，并确定了最佳工艺条件。
- The primary compounds of dechlorination were 2-chlorophenol, 2,4-dichlorophenol, and 2,6-dichlorophenol. 吸脱附过程分别以去氯反应形成2-氯酚、2,4-二氯酚、2,6-二氯酚及加氯反应形成五氯酚。
- The disease is still in its primary stage. 这疾病仍然在初发阶段。
- The little boy left primary school at eleven. 这个小男孩十一岁时小学毕业。
- Sure. We are friends since primary school. 当然，我们从小学就是朋友了。
- I started primary school when I was 5 years old. 我五岁时开始读小学。
- A primary cause of Tom's failure is his laziness. 懒惰是汤姆失败的主要原因之一。
- Primary school teachers use a lot of visual aids. 小学教师使用大量的视觉教具。
- Love and hatred are primary emotions. 爱和恨是基本的情感。
- The Democratic primary was held this month. 民主党候选人初选於本月举行。
- Primary education comes under the umbrella of local government. 小学教育受地方政府的保护。
- He only accepted the primary education off and on in his childhood. 他小时候只断断续续地接受过初等教育。
- The primary reason for advertising is to sell more goods. 做广告的根本目的是要多出售货物。
- Collins was nosed out by his opponent in the primary. 柯林斯在初选中就被他的对手击败了。
- Not derived from something else; primary or basic. 基本的不是从它物派生的; 原本的或基本的
- We lost the New Hampshire primary. 我们在新罕布夏州的初选失利了。
- A leaflet or primary division of a pinnately compound leaf. （复叶的）羽片羽状复叶的小叶子或羽片部分
- We regard husband and wife as the primary units of the family. 我们把夫妻视为家庭的基本成员。
- Botany A leaflet or primary division of a pinnately compound leaf. （复叶的）羽片：羽状复叶的小叶子或羽片部分
