He would project a photograph onto the canvas or paper and then trace the image.

他曾计划将照片转到帆布和纸上，然后完成影像的绘制。

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First, trace your hand on a white piece of paper.

首先，在一张白纸上描出您的手。

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The separation and enrichment of trace tin and trace germanium was researched in this paper.

本文主要阐述的是微量锡与微量锗分离与富集的研究。

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Museum of Handcraft Paper, Gaoligong Mountain, China / Trace Architecture Office.

手工造纸博物馆，中国，高黎贡山/跟踪建筑事务所。

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Trace wheel through pivot paper, line A to BP.

用擂盘在旋转纸上画线，从A1点到胸点。

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Remove the pivot paper. Use a pencil to mark over trace-wheel lines.

移动旋转纸。用锅笔标出擂盘线。

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This paper studies the analysis method of trace iron.

对痕量铁分析方法进行了研究。

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This paper discuss; on : 1. Geochemical background values of trace elements;

本文讨论了有关：1）痕量元素地球化学背景值；

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This paper discuss; on : 1. Geochemical background values of trace elements;

本文讨论了有关：1）痕量元素地球化学背景值；

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