经过三天的航行，我们已看见陆地。
第二轮北京六方会谈，经过三天多磋商，完成了预定议程。
The second round of six-party talks in Beijing has completed its agenda on the schedule through 3 days of consultations.
经过三天的观察，他们找到了水坝塌陷的原因，并采取了措施制止。
After three days of observation, they found out why the dam was sinking and took measures to stop it.
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