★★★ Useful Expressions for Technical Papers ★★★

1) Predicting the future trajectory of traffic agents has ____________ in autonomous driving.

a) played a crucial role
b) been a critical task
c) been a key challenge
d) been an essential task
e) been a major concern
f) a challenging task
g) been of great interest

 

2) One of the key challenges in the task has been something.

 

 

3) Somethings can be divided into four categories.

Somethings can be categorized into four groups.

 

 

4) The system has complexity on the order of O(N^2).

The system has (a) complexity of O(N^2).
The system's complexity is O(N^2).