Some ice cores have annual layers just like trees do, you know, how you can count tree rings?

有些冰核有年生的层，就像树样，你知道，你怎么数年的？

We are getting our last round of hardy annuals in.

我们将迎来最后寒的年生植物。

Annuals that are good for cutting include cosmos, globe amaranth, larkspur, and Queen Anne's lace.

适合剪下来的年生植物包括大斯菊、千日红、千鸟草和野胡萝卜花。

But many of the big seeds, notably those of the annual cereals and pulses, are edible by humans.

但许多大种子，年生谷物和豆类的种子，可供人类食用的。

The descriptions often include whether specific kinds of flowers, from perennials, annuals or tender perennials, work well for cutting and showing.

描述通常包括以下内容：特定种类的花否适合剪下来并展示，不管多年生植物、年生植物还纤弱的多年生植物。

For annual plants growing in an area with a very unpredictable climate, it could be lethal if all the seeds sprouted quickly and simultaneously.

对于生长在气候非常不可预测的地区的年生植物来说，如果所有种子同时快速发芽，可能会致命。

The combination of these two factors—a high diversity of species and a high percentage of annuals—means that western Eurasia's Mediterranean zone is the one with by far the highest diversity of annuals.

这两个因素的结合——物种的高度多样性和年生植物的高比例——意味着欧亚大陆西部的地中海地区迄今为止年生植物多样性最高的地区。