apply oneself to bone up on put one's back into be wedded to keep one's mind on throw oneself heart and soul into wholly absorbed with single-hearted devotion with singleness of purpose
                            apply oneself to
                            
                                英 [əˈplaɪ wʌnˈself tu]
                            
                            
                            
                            throw oneself heart and soul into
                            
                            
                            
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