善长于 meaning in English

be good / poor at
be good at

People who are " word smart " are good at languages
这些文字聪明的人，善长于语言。
For such a young girl , what tact , what a finished perfection of manner
这样年轻的姑娘善长于保持有分寸的态度！
He is good at table tennis
他善长于乒乓球。
In hong kong this week , is dr . mark messina , us nutritionist specializing in soy and health relationships
善长于研究大豆与健康关系的美国著名营养学家马克?莫西纳博士（ drmarkmessina ）将于本星期六在本港出席一学术研讨会。
He was , however , the same cocl s , good , patient , devoted , but inflexible on the subject of arithmetic , the only point on which he would have stood firm against the world , even against m . morrel ; and strong in the multiplication - table , which he had at his fingers ends , no matter what scheme or what trap was laid to catch him . in the midst of the disasters that befell the house , cocl
可是，他仍是那过去的柯克莱斯，善良，忠诚，不怕麻烦，但在数学问题上却绝不屈服，他在这一点上，会坚决地站起来和全世界抗争，甚至和莫雷尔先生抗争他还善长于九九乘法表，把它背得滚瓜烂熟，不论设什么诡计圈套去考问他，总也难不倒他。