“改善”造句

洛杉矶穷人的境况仍未得到改善。
Conditions for the poor in Los Angeles have not improved.

他关心人类生存环境的改善。
He was concerned with the enhancement of the human condition.

老师们告诉我特雷西的行为大有改善。
Teachers inform me that Tracey's behaviour has improved no end.

• #改善