植物修复是解决污染土壤问题的有效途径之一，而已报道的超积累植物的种类非常有限。
Phytoremediation is one of the effective ways in resolving problems of contaminated soils, but limited hyperaccumulation plant species were reported and documented.
超积累植物是植物修复技术的关键，筛选和发现超积累植物是植物修复技术的难点所在。
Screening of hyperaccumulators, plants that accumulate high levels of heavy metals, is prerequisite for the technique.
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