1合金鋼由加進(jìn)下列一種或幾種元素制成：鎳、鎢、硅和少量別的合金元素。

2她打開(kāi)門，讓他進(jìn)來(lái)。

3她蹦著跳著越過(guò)草坪，跑上小徑，跨上臺(tái)階，穿過(guò)涼臺(tái)，進(jìn)了門廳。

4他回來(lái)的時(shí)候，電腦還開(kāi)著，把他嚇了一跳

1. Alloy steels are formed by the addition of one or more of the following elements: nickel, tungsten, silicon and small amounts of other alloying elements.

2. She opened the door to let him in.

3. She skimmed over the lawn, up the path, up the steps, across the veranda, and into the porch.

4. When he came back, the computer was still on, which gave him quite a start.