Your child climbs aboard and becomes the brave engineer who saves the traveling circus train from certain danger.

您的孩子成了小火车的司机，勇敢地将马戏团火车从危险中救了出来。

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Have certain danger, any outdoor exercises, must obey a group leader commanding, do not assume any responsibility if cause leads to serious consequences, the group leader because of oneself.

任何户外运动都有一定的危险性，必须听从领队指挥，如因自身原因导致严重后果，领队不负任何责任。

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If fish are able to remember that a certain area contains (容纳) safe food, they will be able to go back to that area without putting their lives in danger.

如果鱼能够记住在某一地方有安全的食物，它们将能够回到那个地方，不会将自己置于危险之境。

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This generation of soldiers, sailors, airmen, Marines and Coast Guardsmen have volunteered in the time of certain danger.

WHITEHOUSE: President Obama at Fort Hood: "Greatness Before Our Very Eyes" | The White House

Mr. Calleja believes that modern opera productions also have to be believable, and said that he can recognize certain danger signals while rehearsing a new production.

WSJ: Joseph Calleja | Faust | Here to Deal With the Devil | Cultural Conversation by Barrymore Laurence Scherer

Worse, Mr Thurlow says that Mr Kerry's boat fled from the scene after the mine exploded, turning back to go to the aid of the disabled boat only when its captain was certain there was no danger.

ECONOMIST: John Kerry's war record gets shot at