Original: The wave gradually became more organized as it crossed the Caribbean and late on July 3 it strengthened into Tropical Depression Three about 80 miles (130 km) east of Chetumal, Mexico.
Simplified: The wave steadily became more organized as it came to the Caribbean Sea and late on July 3 it strengthened into Tropical Depression Three about 80 miles (130 km) east of Chetumal, Mexico.