This acted as a seal to prevent damage.

VOA: special.2010.08.03

and Pembroke area there's a place, "the steps", that if you step on the seal,

在彭布鲁克区，有个地方叫“台阶”，如果你踏在了印记上，

布朗的学生们 - SpeakingMax英语口语达人

Still,Europe is pushing ahead, hoping parties to the Nabucco pipeline will seal a deal with Turkey by June.

VOA: standard.2009.05.08

But knowing what percentage this is of the total amount leaking from the well will not be possible until a tight seal is on the well.

VOA: standard.2010.06.14

But Weissman says the survey by Green Seal and the firm EnviroMedia Social Marketing shows that consumers are uncertain how to tell whether a product helps the environment.

VOA: standard.2009.03.30

Weissman says Green Seal will launch a consumer education campaign this year.

VOA: standard.2009.03.30

Weissman says that is where Green Seal plays a role.

VOA: standard.2009.03.30