英语语法分析

Cedar heartwood is also an excellent choice, at a bit less cost.

雪松心也是一个很好的选择，少一点成本。

What can be said about the range of dates of the last heartwood rings?

怎样描述最后的心材环的日期范围。

The black heartwood has uneven red - brown stripes or a marbled effect.

黑色心材上有错落的红棕色条纹或大理石纹理。