TASK DEFINITION: In this task, we ask you to rewrite a sentence in simple English without changing its general meaning. Essentially, you want to make the sentence easier to read by using simpler words, utilizing more straightforward sentence structures, and omitting non-essential information etc.
PROBLEM: The UEFA Champions League ( abbreviated as UCL ) is an annual club football competition organised by the Union of European Football Associations ( UEFA ) and contested by top-division European clubs , deciding the best team in Europe .

SOLUTION: The UEFA Champions League is a football competition between the best club teams in Europe .

PROBLEM: Bulletproof glass ( ballistic glass , transparent armor , and bullet-resistant glass ) is a strong and optically transparent material that is particularly resistant to penetration by projectiles .

SOLUTION: Bullet-proof glass , or bullet-resistant glass , is a type of strong , clear material that resists bullets .

PROBLEM: At the same time MTRCL changed its Chinese name from " 地下鐵路有限公司 " ( Subway Limited Company ) to " 香港鐵路有限公司 " ( Hong Kong Railway Limited Company ) , but left its English name unchanged ; at the same time the system 's Chinese name changed from " 地鐵 " ( " Subway " ) to " 港鐵 " ( " Hong Kong Railway " ) .

SOLUTION:
At the same time MTRCL changed its Chinese name from " 地鐵有限公司 " ( Subway Limited Company ) to " 香港鐵路有限公司 " ( Hong Kong Railway Limited Company ) , but left its English name unchanged .