When placed on the ground, baits should be situated on small paper cards or other flat, light-colored surfaces, or in test-tubes or vials.

诱饵放在地上时，应放在小纸卡上或其它平坦的浅色表面上，或放在试管或小瓶子里。

youdao

His experiments actually did show a lot about the relationships between colors themselves, about how colors change when placed next to other colors, about how they interact with one another.

他的实验确实展示了颜色本身之间的很多关系：和其他颜色放在一起时它们会如何变化，以及它们之间是如何相互作用的。

youdao

Minus signs are also accepted when placed in accordance with the current pattern.

依照当前模式放置，负号也被接受了。

youdao

When the plants are twenty centimeters high, tie the plants to a stick placed in the pot to support them.

VOA: special.2009.04.21

I've got to find them by experimenting, by putting other bodies and seeing how they react and then finding out what's the force that acts on a body when it's placed in this or that situation.

我得通过实验找出这些力,我会增加其它物体,观察其反应,求出当它处在这种或者那种情况下时,作用在物体上的力

耶鲁公开课 - 基础物理课程节选

The researchers described what happened when they placed the coral larvae into the chamber.

VOA: special.2010.08.10

Each of the transistors can independently produce an electronic signal when placed under mechanical strain.

BBC: Sensors

They slurp caramel macchiato as coffee and believe that candy, when placed in a bowl, becomes cereal.

ECONOMIST: The competition to make the most natural fake sugar

Their silence becomes all the more enraging when placed against the massive support Israel receives from rank-and-file American Jews.

CENTERFORSECURITYPOLICY: Where Obama is leading Israel