1·Six years ago I founded KIPP Heartwood Academy, a public charter school in San Jose, part of a network of 99 KIPP schools nationwide.
六年前我在圣何塞建立了一所公立特许学校——KIPP心材学院，这是全国99所KIPP学校中的一所。
2·Six years ago I founded KIPP Heartwood Academy , a public charter school in San Jose, part of a network of 99 KIPP schools nationwide.
六年前我在圣何塞建立了一所公立特许学校—— KIPP心材学院 ，这是全国99所KIPP学校中的一所。
3·It is important to note, color in this explanation refers to sapwood and heartwood.
重要的一点说明是，这里的颜色是指边材和心材的颜色。
4·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。
5·One or more layers of living and functional sapwood cells are periodically converted to heartwood.
每个生长周期都有一或多层活的边材细胞转变成心材。