因为,由于 1. navigation is difficult on this river because of the hidden rocks. 因为河上有暗礁，所以在这条河上航行很困难。 2. her company is suing her for slander because of her remarks about their safety record. 由于她发表了关于公司安全记录的言论，该公司正以诽谤罪起诉她。 3. many beautiful fish are fast disappearing because of the severe pollution. 因为污染严重，许多美丽的鱼类正在面临绝种。
