selection of superior provenances的用法和樣例：
例句
- Provenances selection and afforestation technique of Fraxinus mandshurica Rupr.
水曲柳優(yōu)良種源選擇及造林技術(shù)。 - So, the cold-tolerance trait should be the key factor in Z. insignis provenance selection.The individual selection was the key to cultivate fast-growing fine varieties.
因此，抗寒性等特異性狀的選擇應該成為翅莢木種源選擇的重點(diǎn)，單株選擇是培育速生良種的關(guān)鍵。
