beneficial

UK:  [.benɪ'fɪʃ(ə)l]

US:  [.benə'fɪʃ(ə)l]

adj.

1.有利的,有利可图的,有益的,有助于

2.受益的

3.有必要

4.有利的,有益的,; 【法律】可享受利益的,有收入权益的

1 . Trauma is not necessary but is often the initiating event, so an efficient method for evaluation is beneficial.
创伤不是必要条件，但经常是首发诱因，所以建立一个有效的方法以利评价是有益的。

2 . But a declining population is going to have at least two very beneficial economic effects.
不过衰减的人口数量至少会带来两项非常有益的经济效应。

3 . It's easy to work because you think it's a "good idea" or because you think you should, and not because it's necessary or beneficial.
工作很容易，因为你认为它是一个“好主意”，或者因为你觉得应该工作，而不是因为有必要工作或工作是有益的。

4 . He said China was willing to work with Tajikistan to deepen mutually beneficial cooperation and push forward bilateral ties.
中方愿与塔方共同努力，深化互利合作，推动两国关系向前发展。

5 . The concept of statistical errors was an admission that acknowledged ignorance could be quite beneficial in trading.
统计学上的错误就是认为无知对交易有利。