There are three main checkpoints at Sea-Tac and a fourth that is opened as needed during peak periods.

The main checkpoints that control the cell division cycle in eukaryotes include:

If she was lucky, she'd be able to get it past the main checkpoint, and then she could look for the Vulcan delegation.

There are two main checkpoints, the G1/S and the G2/M, during the cell cycle, which preserve correct progression.

They followed a tarmac drive to the main checkpoint.

But three key certified statements by Mr. Fail, the main checkpoints for regulators, contained conflicting information.

Initially, the attackers attempted to enter the compound at the main checkpoint.

The main checkpoints would remain in place, though soldiers would seek to facilitate passage, the official said.

This regime has been modified and visitors apply for entry documents at the main checkpoint.

The latest attack was on the main east-west road through town, known as Highway 10, near the main checkpoint on the city's eastern edge.