一个有价值 meaning in English

a worthy son

In the conjunction of america and europe james had a rewarding theme .
詹姆斯在欧美的结合体里找到了一个有价值的题材。
The model comprising accretion onto a neutron star or black hole companion must still be considered a favored hypothesis .
在中子星或黑洞伴星上发生吸积的模型，仍应看成是一个有价值的假说。
I had trouble seeing myself as someone of value
我难以把自己看作一个有价值的人。
The regional economy combined : a valuable research field
一个有价值的研究领域
To do some one thing well is a worthy ambition
决定把一件事做好,这便是一个有价值的雄心

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