“留心的”的英语可以翻译为：alert，observing，[法] observant，precautionary，jealous ...

“好心的”的英语可以翻译为：good，well-meaning ...

“核心的”的英语可以翻译为：nucleus，central...

铁棍是实心的, 而管子是空心的.A bar of iron is solid; a pipe is hollow.铁条是实心的, 管子是空心的.A iron bar is solid; a pipe is hollow.最早的汽车轮胎是实心的.The tires of the earliest cars were solid....

“求心的”的英语可以翻译为：[医] axipetal，axopetal ...

“粗心的”的英语可以翻译为：careless，negligent，harebrained，slapdash，hairbrained ...

“离心的”的拼音为：...

“放心的”的英语可以翻译为：unworried，reassuring ...