冰箱在说话
您好，concern 在英语可以是（名词），也可以是（动词）使用，而 concern over something 通常是以（名词性）的 concern 出现。
1）concern（作动词，及物动词）后接宾语，比如 concern somebody/something，通常可以译为【涉及，关于（某人/某物）】，比如：The story concerns a friend of mine.（故事讲的是我的一个朋友。）Don't interfere in what doesn't concern you.（不要干扰和你无关的事物。）
concern 作为动词还可以译为【使某人担忧或不安】，比如：This incident concerns me.（这件事故让我担忧。）The roof of the barn concerns me because eventually it will fall in.（谷仓的顶终究会塌下来，这让我担忧。）
作为动词，concern 通常也可以和一些介词共同使用，比如：be concerned with something（认为……重要或有趣；关心，关切）concern youself with/about something（对……感兴趣）be concerned in（与……有关系；对……负有责任）concern oneself with（喜爱；关心；从事，忙于）
2）concern（作名词）时，作为不可数名词，译为【担心；忧虑；烦恼】，作为可数名词，译为【忧虑（或烦恼）的原因】；还可以译为【关注的事；关系重大的事】。
作为名词，concern 通常也可以和一些介词共同使用，其中就有您提到的 over，比如：in somebody's concern（替某人担心）out of concern（出于关心）concern about something/somebody（对……的担忧）,比如：Villagers expressed concern about the low level of tourism.（村里的人表达了对旅游业的担忧。）concern over something/somebody（对……的担忧），比如：The report raises serious concerns over safety at the factory.（该报告引发了对工厂安全的严重担忧。）concern for（对……的担忧）,比如：She hasn't been seen for four days and there is concern for her safety.（她已经四天没有露面了，有人担心她的安全。）concern among somebody（某人的担忧），比如：The school's recent examination results have sparked concern among parents.（学校最近的考试成绩引起了家长们的担忧。）
希望这样的解释能够帮到您。
BuleS天之蓝
different adj. 不同的 各别的, 差异的 [常作表语] as different again 又大不相同(指向好处转变的差异) as different as chalk from cheese (尽管外表相似)本质上完全不同 be different from 与...不同 be different to 与...不同 be different than 与...不同 The two boys are different in their tastes. 这两个男孩的兴趣是相异的。 I don't like that dress, I want a different one. 我不喜欢那套衣服，我想要一件不同（样式）的。 It was very different from modern car races but no less exciting. "它与现代小汽车比赛大不相同,但激动人心的程度却毫不逊色。" Susan is different from / than / to Alice. 苏姗和爱丽丝不同。 difference n. all the difference (in the world) 天渊之别, 大不相同 as near as makes no difference 没有多少差别 iron out the difference(s) 消除分歧 make a great difference 有很大差别, 有很大 不同 有很大的关系[影响] make a difference between 区别对待 make some difference to 对...有些[没有]关系 make no difference to 对...有些[没有]关系 make all the difference 关系重大, 大不相同 make all the difference in the world 关系重大, 大不相同 make a world of difference 关系重大, 大不相同 pay the difference 付差额金 meet the difference 付差额金 settle differences 调停 split the difference 妥协, 折中, 互相让步 the difference between tweedledum and tweedledee 几乎没有什么差别 What's the difference? 这有什么关系呢? Young people must be taught to learn the difference between good and evil. 必须教导年青人学会区分善与恶。 The differences between manual labour and mental labour are diminishing in some developed countries. 在一些发达国家体力劳动和脑力劳动的差别正在缩小。 There are many differences between living in a big city and living in the country. 生活在大城市与生活在乡村有许多不同之处。 I can't see much difference in them. 我看不出他们有什么大的差别。 The difference between 8 and 2 is 6. 八和二差是六。
略过剧情
differentadj.不同的各别的, 差异的[常作表语][美]异常的different materials 不同的材料be different from 与...不同differently习惯用语as different again 又大不相同(指向好处转变的差异)as different as chalk from cheese (尽管外表相似)本质上完全不同be different from与...不同be different to 与...不同be different than 与...不同differencen.差异, 不同不和, 争论【数】差、差额【逻】特殊性a difference in character 在性格上的差别a singer with a difference 别具风格的歌唱家They have had a difference. 他们有所争论。习惯用语all the difference (in the world) 天渊之别, 大不相同as near as makes no difference 没有多少差别iron out the difference(s) 消除分歧make a difference 有很大差别, 有很大 不同 有很大的关系[影响]make a great difference 有很大差别, 有很大 不同 有很大的关系[影响]make a great deal of difference 有很大差别, 有很大 不同 有很大的关系[影响]make a difference between 区别对待make some difference to 对...有些[没有]关系make no difference to 对...有些[没有]关系make all the difference 关系重大, 大不相同make all the difference in the world 关系重大, 大不相同make a world of difference 关系重大, 大不相同pay the difference 付差额金meet the difference 付差额金settle differences 调停split the difference 妥协, 折中, 互相让步the difference between tweedledum and tweedledee 几乎没有什么差别What's the difference? 这有什么关系呢?
