如同儿戏 meaning in English

be like child's play

Earlier, he had made decisions with almost sportive ease; now, he had to force them out of his exhausted brain .
以前，他做决定如同儿戏，如今，绞尽脑汁，好不容易。
In fact , they are so powerful that building compilers for fortran or c is child s play if you are fluent in lex and yacc
事实上，如果你熟练掌握lex和yacc的话，它们的强大功能使创建fortran和c的编译器如同儿戏。