You can then use elements e1 and e2 as the source or target when defining a mapping, as shown in Figure 4.

然后可以在定义映射时使用元素e1和e2作为源或目标，如图4所示。

youdao

The requirements writers will detail the requirements for E1.

需求书写者将为E1详述需求。

youdao

The aim is to observe the glucose-lowering effect of stilbenoid E1.

目的观察二苯乙烯类化合物 E1 的降糖作用。

youdao

Introducing the first two handsets of Acer's 2013 line-up: the Liquid E1 and the Liquid Z2.

ENGADGET

At roughly the same size as the FUJIFILM X100, the X-E1 is refreshingly compact and lightweight (12.35oz(2)).

ENGADGET: Fujifilm grows X-series mirrorless lineup with 16.3-megapixel X-E1

With its compact, travel-friendly size, the X-E1 promises to be an exciting addition to the FUJIFILM X-Series.

ENGADGET: Fujifilm grows X-series mirrorless lineup with 16.3-megapixel X-E1