Dgps
差分GPS系统
🗣️ 情景例句
because she's had to go to Chicago on a business trip and can't leave till tonight.
因为她得到芝加哥出差，而且要到今晚才能脱身。
Dot the i's and cross the t's.
一点一划，循规蹈矩。
We need to make some changes in this contract.
这份契约有几个地方需要修改。