In order to achieve interstellar travel, Matloff stresses that less mass and more of a solar push are key.
为了实现星际航行，马特罗夫强调，更轻的飞船质量以及更强的太阳光推力是关键。
2
The poor guy didn't have a "Help" key to push.
可怜的家伙那时并没有计算机上的“求助”键可使用。
3
In the first part of the test, participants are asked to push the "e" key for either black faces or negative words and the "I" key for white faces or positive words.