Dgps
差分GPS系统
🗣️ 情景例句
He appeared ill at ease at the party.
他在宴会上显得很拘谨。
There is no royal road to learning.
治学无坦途。
Because Manhattan Island is made of solid rock, it is safe to build very tall buildings.
曼合顿岛是由坚固的岩石构成的，这使得兴建大厦非常安全。