1.periodically 定期地
Meetings are held periodically to monitor progress on the case...
定期舉行會議以監督案件的進展 。
2.monitor 監控
Officials had not been allowed to monitor the voting.
官員們未曾獲許監控選舉 。
3.trail 路徑
...a large area of woodland with hiking and walking trails.
…有徒步旅行和散步路線的大片林區 。
4.deployment 部署
The two countries are competing in the deployment of intermediate-range missiles.
兩國正在競相部署中程導彈 。