bit by bit

1.He dug the garden bit by bit.

他点点地挖园子。

2.They assembled the model ship bit by bit.

他们块块地装宇宙飞船的模型。

3.In the sunshine, we bereathe rockily , and expand bit by bit, intonating the eternity of life together.

在岁月哀婉的歌声中，只有它才能对抗。