这些生物往往体型较大、寿命较长，并且每年在繁殖上花费的精力相对较少。
These organisms tend to have big bodies, are long-lived, and spend relatively little effort each year on reproduction.
对于半导体型(8,4)管，由于其管径较大，氮原子掺杂对其影响相对较小。
Because of large diameter, doping of nitrogen atoms make a little impact on the chiral (8, 4) CNTs.
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