一心一意----with undivided attention
例句:
A: He,s really attentive to his work.
他做事的确用心。
B: Actually,he often works with undivided attention.
事实上,他经常是一心一意地做事。
同义词:heart and soul; heart and hand
注释:be attentive to 留心···,注意···
with attention 留心地;注意地
adj. 注意的,留意的