同根派生 rush nut相关词英汉例句Nutgrass can still be problematic because there is enough energy stored in the nut to allow young seedlings to puncture the mulch and emerge.莎草仍然是个难题，因为在坚硬的果实中储有足够能量使其幼苗穿透薄膜而生长。rush nut更多例句