... concern oneself in关心，忙于 concern oneself about关心，忙于 in concert with sb.与……一致 ...
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... concern oneself in关心，忙于 concern oneself about关心，忙于 in concert with sb.与……一致 ...
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... concentrate(...)on... （把...）集中在... concern oneself about 关心，挂念 consist in 在于 ...
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