“五个”用英语怎么说

四五个男人在喝保温瓶里的茶水。Four or five men were drinking tea from flasks.我们的班机最终晚了五个小时起飞。Our flight eventually left five hours late.这门课程包括十个必修单元和五个选修单元。The course consists of ten core modules and five optional modules....