rubber plantations短语¹⁸⁰⁰⁹⁸⁺¹ 基本例句 橡胶林 Scientific rubber plantation management in combination with chemical control was quite effective in the manipulation of land leech population in rubber plantations. 科学的林段管理与控制山蛭数量相结合的措施，能更好控制山蛭数量。 cnki What challenges are faced by the rubber plantations in Malaysia today? 如今马来西亚的橡胶园面临哪些挑战？ xcdf