ph.

1. They have decided to phase in the new techniques.
他们已决定逐步引入新技术。

1. 逐步到位：注册资本 registered capital | 逐步到位 phase in | 逐步取消 phase out

2. 同步：phase-failure protection 断相保护 | phase-in 同步 | photoelectricity 光电

3. 逐渐采用：phase 阶段 | phase-in 逐渐采用 | phase-out 逐步淘汰

4. 逐步采用：pharynx 咽 | phase in 逐步采用 | phase out into 逐步转入

1. 逐步采用；分阶段引入
If a new way of doing something is phased in, it is introduced gradually.

e.g. The Health Secretary told Parliament that the reforms would be phased in over three years...
卫生大臣对议会说，改革将在3年内逐步展开。
e.g. The change is part of the government's policy of phasing in Arabic as the official academic language.
这一变革是政府将逐步采用阿拉伯语作为官方学术语言政策的一部分。

verb

1. introduce gradually