That which one is morally bound to do.

本分；义务。

An action required in a certain position.

职责。

A tax levied by the government.

(常用复数)税。

Fee imposed on certain good and services.

(货物或服务上的)费用。

The respectful behavior due to parents or superiors.

孝道；恭顺。

The quantity of irrigation water required to fill the needs of the area of a particular crop.

(灌溉一区特别农作物所需的)灌溉水量。