1、obligation

义务;责任

When teachers assign homework, students usually feel an obligation to do it.

老师布置作业时，学生通常认为完成作业是一种义务。

Ministers are under no obligation to follow the committee's recommendations.

部长不必非得听从委员会的建议。

(照顾某人或保护某人利益的)义务，责任

The United States will do that which is necessary to meet its obligations to its own citizens.

美国将为自己的公民尽其应尽的义务。

I have an ethical and a moral obligation to my client.

我对我的当事人负有道义上的责任。

(广告中产品或服务)免费试用地，免费体验地

If you are selling your property, why not call us for a free valuation without obligation?.

如果您打算出售房产，何不打电话让我们作免费估价呢？

You can review your policy in detail for a full 15 days without obligation.

您可以在15天的免费体验期内仔细审核保单细则。

2、appreciate

欣赏；鉴赏；赏识

Anyone can appreciate our music.

任何人都能欣赏我们的音乐。

In time you'll appreciate the beauty and subtlety of this language.

总有一天你会体会到这门语言的优美和微妙之处。

领会；了解；认识

She never really appreciated the depth and bitterness of the Irish conflict.

她从来没有真正认识到爱尔兰矛盾的深刻和激烈。

He appreciates that co-operation with the media is part of his professional duties.

他懂得与媒体合作是自己工作职责的一部分。

感谢;感激

Peter stood by me when I most needed it. I'll always appreciate that.

当我最需要的时候，彼得在我身边支持我。我将永存感激。

Thanks, lads. I appreciate it.

谢了，哥们儿。我很感激。