经济学人下载:害虫防治:弦理论(2)

1.periodically 定期地
Meetings are held periodically to monitor progress on the case...
定期举行会议以监督案件的进展。
2.monitor 监控
Officials had not been allowed to monitor the voting.
官员们未曾获许监控选举。
3.trail 路径
...a large area of woodland with hiking and walking trails.
…有徒步旅行和散步路线的大片林区。
4.deployment 部署
The two countries are competing in the deployment of intermediate-range missiles.
两国正在竞相部署中程导弹。