他眼睛直视前方，加速超过了前面一辆慢吞吞行进的大卡车。He looked straight ahead and overtook a lumbering lorry.卡车倒车和掉头的时候，我听见发动机的轰鸣声。I heard the engines revving as the lorries backed and turned.他们用卡车猛撞大门。They used a lorry to ram the main gate....
Lumbermen rafted the logs down the river.伐木工们将圆木排顺流漂下.The lumbermen were perished with cold.伐木工人冻僵了.Our lumbermen used heavy - duty trucks for transporting logs.我们的伐木工人使用重型卡车运送木料....
The proof is recoated with dichromate emulsion.将这张校样重新涂以重铬酸盐乳剂.Preferally, the anion portion of the salt is permanganate, iodate, dichromate or hyperchlorite.它的阴离子部分最好是高锰酸, 碘酸, 重铬酸或过氯酸根.The main methods are: glass - elec...
The enzyme activity test results showed that aldolase could transform Nacetyl - D - ManNAc into N - acetyl - D - neuraminic acid very efficiently.经纯化后催化活性实验结果表明,醛缩酶可将N- 乙酰 -D- 甘露糖胺高效率地转化为N - 乙酰-D-神经氨酸,表现出较高的催化活性....