逐渐成形;渐渐发展
to gradually be seen or gradually develop
Trees and hedges started to take form as the fog cleared. 随着雾气散去，树和篱笆开始渐渐显露。
As they chatted, the idea of going skiing together gradually took form. 他们聊天时，逐渐形成了一起去度假的想法。
For me, the problem with the novel is that the characters never quite take form.
It's fascinating watching an artist working and seeing a painting gradually take form.
Although he was very unwell at the time, he did live to see the idea take form.
See also: form noun (SHAPE)