alternate

To make the appetizer, you should alternate layers of tomatoes and cheese. [=you should place a layer of tomatoes, then a layer of cheese, then a layer of tomatoes, etc.]做这道开胃菜，你应该把西红柿和干酪分层交替摆放。

The poem/poet alternates fear and hope.这首诗/这位诗人把恐惧与希望交织在一起。

The necklace is made by alternating glass beads with shells.这条项链是玻璃珠和贝壳交替穿成的。

The poem/poet alternates fear and hope with each other. = The poem/poet alternates fear with hope.这首诗/这位诗人把恐惧与希望交织在一起。

The light and dark woods alternate to form an elegant pattern around the window.深浅不一的树木错落有致，在窗口形成一个优美的图案。

Light woods alternate with dark woods.深浅不一的树木错落有致。

The poem alternates between fear and hope.这首诗把恐惧与希望交织在一起。

He alternates between riding his bike and taking the bus to work.他时而骑自行车去上班，时而乘公共汽车去上班。

alternate sunshine and rain时晴时雨

Alternate shades of wood formed a pattern around the window.深浅不一的树木在窗口形成了一个图案。

The fair is held on alternate years. [=the fair is held every other/second year; the fair is held one year, not held the next year, held the following year, and so on]这个交易会隔年举行一次。

She picks the children up from school on alternate days. [=(for example) she picks up the children on Monday, Wednesday, and Friday]她隔天去学校接一次孩子。

We took an alternate route because of the traffic.由于交通堵塞，我们走了另外一条路线。

Due to an emergency, the plane landed at an alternate airport.由于情况紧急，这架飞机降落在一个备用机场。

The town has elected five councilors and two alternates.这个镇选出了五名政务会委员和两名候补人员。

an alternate juror候补陪审员