So the research on fleet planning needs to be further improved.

因此，船队规划的研究工作需要进一步改进和完善。

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At the same time, its reliability needs to be further improved for rising operating temperature and stress.

与此同时，工作温度和应力的提高也需要进一步改善其可靠性。

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Although the details of Maslow's needs theory needs to be further improved, its major principle and direction are undoubtedly credible.

马斯洛虽然在细节上有待进一步的完善，但在大的原则方向上无疑是可信的。

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