The leader was much concerned over the plight of the refugees.
那位领袖对难民很担忧。
The leader was much concerned over the plight of the refugees.
那位领袖对难民很担忧。
She is always concerning herself over him.
她一直在关心他。
There is a lot of concern over the amount of herbicides and pesticides used in farming.
人们对农业上灭草剂和杀虫剂用量非常担忧。
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