vt. 1.不充分供应，使存货不充足。 2.不充分供应(农场等)牲畜。 n. 存货不足。 n. 【植物；植物学】 (嫁接用的)砧木。
stock with less than the usual or desirable number or quantity
例句与用法
1.
After the graft union has sealed, the upper portion of the understock is removed . 待接口愈合之后，除去砧木的上部。
2.
The understocks should be grown in place or should be potted approximately a year prior to grafting . 砧木在嫁接前一年左右就应当定植在适当的地方或者盆栽起来。
3.
Cells of scoin and understock live in harmony with each other, but do not interlace in such a manner as to form a mechanically strong point . 接穗和砧木细胞也能相互协调地生活，但是不能相互交错以形成机械上牢固的结合。
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